Internet store of wholesale trade

The store operates on the OpenCart engine with a paid, modified template. The main problem in the creation of this project is to rewrite the standard forming template and calculate the value of the goods taking into account the options! The customer will expand the standard set of mathematical operators ( +, -, *, / ) and add the possibility to designate the option of the product (phase) in the form of %. Simple modules to solve this question did not succeed, according to this was made the decision to write an extension to JS.

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