I have set the Attribute values as dropdown menus which include only numbers.
I want some fields on the product creation page which will allow me enter certain +/- values and these values will be added or subtracted to the attribute option value a certain place on the packing slip.
For a product named "Red Pants" if a customer selects 20 as his choice of attribute value for an Option name "Length".
On the admin product creation page of "Red Pants" a field should be created in this case called "Length Margin" and I should be able to enter a +/- value and I enter say +2.
Finally on the packing slip the result should show (20+2)22.
There are about 8 option names and each option name can have any number of option values.
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