Sarter Corporation is in the process of preparing its annual budget. The following beginning and ending inventory levels are planned for the year.

Beginning Inventory Ending Inventory

Finished goods (units) ............. 70,000 20,000

Raw material (grams).............. 50,000 40,000

Each unit of finished goods requires 3 grams of raw material.

1. How much of the raw material should the company purchase during the year? Assume that company plans to sell 880,000 units during the year.

A) 2,550,000grams B) 2,490,000grams C) 2,480,000grams

D) 2,500,000grams

Answer is D, but i don;t know how to do it. Thank you.