In my web site I will sell printing product such as business cards, posters,,,

Business cards have four type of attribute:
size = {2x3in, 2x3.5, 1.75}
Paper={14 pt, 16 pt, 18 pt}
color= {Color front-noback, Color front, B&W back, Color Front & Back}
Quantity= {250, 500, 1000, 5000}

For each of those attributes price changes.
I decide to add size and paper as product type field.
And color and quantity as line items.
So using product display, price changes when size and paper options got changed, for color and quantity I had problem!
Final price should be as following:
Final price = product *(coefficient of selected color)*(Coefficient of Selected Quantity)

Options:
1) using rules, to calculate the price
cone side : It will requires to create many rules for each different options

2) a custom module I don't know where to start for this one ?!

What would be the best option and how ? (hook_commerce_price_field_calculation_options)

Thanks guys for this great module