Answer:
Percent of sales
Step-by-step explanation:
A pro forma invoice contains a description of goods and services that is being provided by the supplier.
It is sent to the buyer before shipment of the product.
The pro forma invoice also contains information like the eight of the good and shipping cost.
The percentage of sale method of preparing pro forma invoice focuses on the amount of funding that is required to increase sales.
This method forecasts sales and values for the cost of goods sold, operating expenses, and interest expense that are expressed as a ratio of projected sales.