| Author |
POS Help |
elliott4012
Member
Posts: 15
Location:
Joined: 14.08.08 |
| Posted on 23-04-2010 10:14 |
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I am building a POS type software. Can someone please tell me where to start? my issue is with price and math. Tax adding. Help with math. I know how to build DBT's but for the life of me can not figure out how to calc math for orders and how to display them
Thank you. |
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| Author |
RE: POS Help |
vince
Member
Posts: 100
Location:
Joined: 30.01.07 |
| Posted on 23-04-2010 17:55 |
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Hello,
Point of sales?..POS. It is like an electronic selling and purchased processing point. EPOS
(electronic point of sales)
The system works with a back end logging database. It compairs DATA that is input by the operator
and hardware against "known" prices and stock codes and supply amounts.
The databases can be central. ALL linked together for many POS terminals in many geographic
or base locations.
The price structure would be governed by deciding what price point and structure to use.
You would need to know all the currencies and TAX that needed to be concidered. Retail
tax of products varies. In my country we have a "value added tax" of 17.5 percent which the
end cutomer pays in addition to the product basic cost.
Say you are buidling a POS and you get several orders for many items per week. Your database
will "know"
1)what the central store has in stock....
2)what the details of the ordering company are. (Who are they, what specific MATH values apply
to that company? When a sales agreement and contract were initially reached.
3)finally your POS will produce an invoice and BILLING for that company...(electronically and paper
post)
So to do the MATH. You will need to know about simple TAX formulas. My country charges 17.5 cents EXTRA in every DOLLAR sold. Tax is by no means simple and you will need to look at
existing POS systems to try to learn.
A simple example would be a math formula about TAX added to a products price...to get a final
price a customer pays. (17.5 percent tax for example)
make a formula t = 17.5 divided by 100 then multiply that "t" by the prodcut price.
Say a netbook computer is 75 dollars new. 75 * (17.5/100).
That gives you the "t" TAX figure you must add to the 75 dollars.
so 13.125 added to 75.....is the final netbook price...88.125 dollars
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think that is a right example....hope it helps
Vince. |
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| Author |
RE: 1.2.3 |
elliott4012
Member
Posts: 15
Location:
Joined: 14.08.08 |
| Posted on 24-04-2010 09:55 |
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Yes, Thank you. I was looking for more of a 1.2.3 step for limnor programming. I do not know where to start with limnor. One hotdog costs 2.00 and a coke is 1.50. Add then get a total then print. also add tax 7% 2 %. I do not know what to do with limnor side to program this. I know a lot about limnor now but nothing on the MATH side. Any help?
Edited by elliott4012 on 24-04-2010 09:56 |
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| Author |
RE: POS Help |
yw
Administrator
Posts: 670
Location: ***
Joined: 23.06.05 |
| Posted on 02-05-2010 17:11 |
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Someone added a complete POS sample in the Inventory Control shared project (http://www.limnor.com/Studio/InventoryControl.zip). When quantity is entered for a product, calculations are automatically done for Amount, Sub-total, tax, and total due for the order.
Latest version of Limnor Studio (http://www.limnor.com/Studio/LimnorStudioSetup.msi) is needed for the project. |
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| Author |
RE: maths in Limnor |
vince
Member
Posts: 100
Location:
Joined: 30.01.07 |
| Posted on 05-05-2010 13:43 |
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Elliot hello,
Maybe this reply can help.
For programming with Limnor Elliot you just need to read a few
paragraphs from the tutorial.
Math example will be there.
My math skill is terrible.
To create Limnor programs Elliot you often need to solve
actual Problems using math(s). Real life problems. This is not
really computer programming but actual problem solving.
When you have solved the problem....made your formula for TAX
on your food, you can then start to "Limnor program" a small windows tool
for a POS system.
Elliot, what is best thinking is to "shrink" your ideas and thinking to very
very very small examples. When you have a Tiny example that works right
and is a MODEL of your POS idea........ you can then expand on it.
The math performer needs a formula created for your food system. That is
showed earlier above here in this topic.
Elliot, you then create a small windows program with a single page and some
buttons. Label the elements on the page concerning food and then link
a certain BUTTON to the Math Performer's EVALUATE method.
Put a textbox on the page for your TAX calculation result. Put some other
text boxes where the "operator" types in the Amount of types of food ordered.
Grab all your "Operator input" and send it to your Math expression(created above)
and generate the final PRICES on the page screen (put it in a Textbox...the final price)
That is a Small model of your POS which is simply calculating the tax
on the food items. Store your work in your library. It is your work and owned
by you Elliot.
Elliot, to see what each performer does, select it and press F1. Also Elliot,
look in the tutorial on Limnor ideas....like Math Performer and also buttons
and making action lists.
Unfortunately Elliot...there are no videos explaining how to program in the Limnor system. This
was tried but never did appear on here.
Elliot, a good idea is to monitor how long the work is taking you. See if it's
practical and you are getting somewhere realistic.
thankyou,
Vince. |
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