Variable Attribute Rates Depending on the product size?

[mugsinc]

I have a product which has 3 sizes and 5 different attributes which are common, but the attribute prices changes depending on the selected size.

 

ive tried the combinations tab and it seems to hold on to a single attribute price for all three size, how can i get around this.

 

For Example

 

Hot Dog

Small = $10

Regular = $20

Large = $30

 

Attributes = Check Box

Mustard For Small = $1

 

Mustard For Regular = $2

 

Mustard For Large = $3

 

So if i select a regular hot dog with extra mustard, it should be $22. But it holds it to $21.

 

Please help

Edited April 3, 2013 by mugsinc (see edit history)