Product Calc Problem

[ladivito]

i had set a product price $1000 and 1 sub-product $100, 2 sub-product $200 then 3 sub-product $300

in common sense when choose 1 product with 1 sub-product should be $1100. the answer is correct

when choose 2 product and 2 sub-product then the $ should be $2200, but the calculation was wrong ! the logic of calc is base on product which mean when we choose 2 product and 2 sub-product it will count 1 product with 2 sub-product and another pack of 1 product with 2 sub-product.

so the calc is wrong.

anyone have any solution for this ???

Thanks

[ladivito]

anyone able to help ? =.=