In my Drupal Commerce store, I have a field called Commission.

The Commission is input as a percentage (i.e. its not a fixed global value).

I need the final price to be updated so it incorporates the commission. I then need VAT to be added to the commission (but not the original price). The user should be able to see the full price (with commission and commission-VAT) before they add a product to cart.

I thought the rules would be perfect for this situation, especially as it has an action called "Multiply the unit price by some amount". However, this action doesn't seem to accept values from custom fields, even if you bring them into scope in the conditions area of the Rule.

I have watched Randy Fey's excellent tutorials on the Rules and Commercial modules, and I have tried to adapt them to my use case. However, I can't get it to work.

Could some one give me some pointers. Thanks!

In my Drupal Commerce store, I have a field called Commission.

The Commission is input as a percentage (i.e. its not a fixed global value).

I need the final price to be updated so it incorporates the commission. I then need VAT to be added to the commission (but not the original price). The user should be able to see the full price (with commission and commission-VAT) before they add a product to cart.

I thought Rules would be perfect for this situation, especially as it has an action called "Multiply the unit price by some amount". However, this action doesn't seem to accept values from custom fields, even if you bring them into scope in the conditions area of the Rule.

I have watched Randy Fey's excellent tutorials on the Rules and Commercial modules, and I have tried to adapt them to my use case. However, I can't get it to work.

Could some one give me some pointers. Thanks!