We have previously provided custom functions for calculating the profitability of a
quote and a
sales order. There may be instances where the invoice may differ from its corresponding quote or sales order. This could be due to changes in item rates, discounts, or even the addition or removal of items based on customer demands. In such cases, accurately determining the profit margin means you need to calculate it directly for the invoice. Today's custom function will help you with that.
Prerequisites:
1. Create a custom field named "Total Margin" for Invoices. This field will display the profit margin.