Coker Company has budgeted the following unit sales:

The finished goods inventory on hand on December 31, 2020 was 21,000 units. It is the company's policy to maintain a finished goods inventory at the end of each quarter equal to 20%Coker Company has budgeted the following unit sales:

2021 2022

Quarter Units Quarter Units

1 105,000 1 90,000

2 60,000

3 75,000

4 120,000

The finished goods inventory on hand on December 31, 2020 was 21,000 units. It is the company's policy to maintain a finished goods inventory at the end of each quarter equal to 20% of the next quarter's anticipated sales.

How would I work this problem?