Watson Corporation manufactures boxes. The estimated numbers of boxes sold for the first three months of the current year are as follows:

Month	Sales
January	3,000
February	4,200
March	3,900

Finished goods inventory at the end of December was 600 units. Ending finished goods inventory is equal to 20% of the next month's sales. Watson Corporation expects to sell the boxes for $5 each. April sales are projected at 4,500 boxes. How many boxes should be produced in February?