Windsor Lock Company's controller is preparing a production budget for the year. The company's policy is to maintain a finished goods inventory equal to one half of the following month's sales. Sales of 5000 locks are budgeted for April. Complete the monthly production budget for the first quarter:

January February March

Sales in Units 5000 4000 6000

Add Desired units of ending finished goods inventory 2000 ? ?

Desired total units 7000 ? ?

Less desired units of beginning finished goods inventory ? ? ?

Total production units 4500 ? ?