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I need a plugin like the existing one : CALCULATED FIELDS, but with some more functionality

I want to get as result an amount depending of various fields which i can define.

Lets give an example:

Asume that i have a wp e-commerce product with a specific id and a STANDARD price per unit (unit is piece - integer value)

The product may have one or more group of variations and a unit price according to variation (e.g. var1=color, var2=material with color1=+c1 euro, color2=-c2 euro...... and mat1=+m1 euro mat2=+m2 euro .... etc

Note that the sign has a role. +c1 means that the c1... value have to be added to the standard price. -c1 has to be subtracted. Also in some cases i need the variation price to be a percentage of Standard price. Thus it could be : +c1 or -c1 or +c1%. Explaining the last one: if the STANDARD price is 80 and i have a variation with +25% then the +25% means that i have to ADD (+) [url removed, login to view]*80 to the standard price (result 100). If no % symbol, then i have to ADD 25 euros, result 105 )

(+ / -) c1,c2,m1,m2 are value of euros ADDED or SUBTRACTED to the standard price. And if followed by % then the percentage has to be ADDED or SUBTRACTED.

When i click the product from the grid i' m getting in it's detailed form. In this form i want to put the plugin (via shortcode)

***Firstly**** the customer must choose from variations (if exist one or more). So we have the price according to variations


The product in it's detailed form, may have some fields set by me (may have or not. If i put the plugin with the sortcode in the detail form of the product then there are the fields).

Field_1 (horizontal dimension - input by customer)

Field_2 (vertical dimension - input by customer)

field_3 (optionA selection with case 1,2,3....)

field_4 (optionB with case 1,2,3...)

field_from_db: a value got from database depended from the product. i want to name which field i select and may be is more than one.

Field5 : image collection inside frame to select (somethin like a combo box but for images. A image list with paginator and previous / next controls rising as pop up window like joomla extensions)

Amount = ((Field_1+opA)*(Field_2+opA)+field_from_db)*(PRICE_AFTER_VARIATIONS+opB) >>>> this is a customizable final field as result.

opA and opB are values depending of what i selected from optionA and optionB.

The Amount which is the result, and the field5 i want to be passed in the cart, after the customer press the BUY button. The Amount is a field to be passed as the price in the cart. But other fields may be have to be passed. Such fields is the Field5 (image) and maybe a text field or numeric one. It's good to predict a flag PASS_THE_FIELD_TO_CART (true / false) so i can adjust if a field is to be passed.

With the same plugin, various cases of forms may be constructed. They will have different shortcode so i can put in different products different forms of the same plugin, providing the proper shortcode.

That's the challenge.

*repost: Nothing mentioned about visibility and positioning of fields. Some basic formating, like font-color-size-bold, or width of filed may needed

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