Garza Electronics expects to sell 500 units in January, 250 units in February, and 1,000 units in March. January's beginning inventory is 700 units. Expected sales for the whole year are 7,200 units. Garza has decided on a level monthly production schedule of 600 units (7,200 units/12 months = 600 units per month). What is the expected end-of-month inventory for January, February, and March? Show the beginning inventory, production, and sales for each month to arrive at ending inventory.