Attribute Question, Order of Math Operations

[suntex]

Hello,

I am having an issue getting my pricing correct. I am using quantity based pricing. I offer 9 colors included in price, I also have check boxes that the user can click to add additional colors for .10 each (limit 14).

Now, let's say the product price is 1.34 and they click for three more colors. The total is now 1.64 each. All that works perfect. I then have another option after that for Metallic color, if they select that option then it adds 20% to the cost.

Here's the problem, it should calculate it up as...

1.34 + .10 +.10 + .10 = 1.64 * 20% = whatever

it's actually calculating it at

1.34 * 20% then +.10 +.10 + .10

How do I fix this?

I have the options ordered correctly in the attribute manager. What else is there to do?

Thanks,
Rick

[suntex]

Anyone? I could really use some help.

[suntex]

Ok, Here's what it seems like it is doing after some more digging....

The 20% is being figured on the base price, no matter what. If I include the options in the base parice and then place an order for the product and all of the attributes then the price is correct. But if they do not select all of the attributes then the price is wrong.

What I need is the 20% based on the base price + whatever options they choose. Can that be done?