Please add an option in the VPA Invoice section to apply a discount to the final campaign amount due -- like how the agent deductions work in commission worksheet 2.

We offer a % discount to vendors that pay their campaign account upfront and would be great to just apply that discount to the total cost (also outlining what they're saving by paying upfront) rather than creating all our Advert Pack campaigns again with that % discount applied.

When we campaign prices, we would then have to update double the amount of packages due to the different module costs within each campaign.

It is similar idea to this suggestion: https://rexsoftware.uservoice.com/forums/170987-feature-requests.