Deal amount does not reflect discount on invoice

[JHebert]

We typically create deals and invoices according to the following two-step process.

Step 1 - Create Deal
We create deals by adding a deal to the righthand sidebar in the contact or company record. We add line items from our product library. The deal amount reflects the product price and quantity.

Step 2 - Create Invoice
Invoices are created (added) from the deal record using the righthand sidebar and the option-Convert deal to invoice. This is convenient and avoids entering the same information multiple times. We add comments and apply a discount to the invoice subtotal. The invoice amount is updated to reflect the discount.

Problem: The deal amount is not updated to reflect the discount applied in the invoice. This requires a manual copy-paste of the invoice total amount to update the deal amount.

Potential solutions:

1. Offer a setting that, when selected, will update the deal amount to the invoice amount or the total of invoices if more than one invoice is issued and associated with a deal.
2. Provide the option during deal creation to specify a discount, either to individual line items or the invoice subtotal.

Perhaps the deal amount can be updated using a workflow?
Thank you for your assistance.

[TomM2 · Accepted solution]

Hey @JHebert at the moment the invoice amount and deal amount aren't synced automatically. 

You should be able to achieve this pretty easily through workflows though by using "copy property value" and copying the invoice amount into the deal amount property:

I'd probably set the trigger to be something like "invoice amount is known"