Nano, Inc. is preparing its budget for the second quarter. The following sales data have been forecasted: April May June July August Unit Sales............. 640 720 780 620 660 Additional Information follows: Inventory on March 31: 192 units Desired ending inventory each month: 30% of next month's sales How many units should be purchased in April, May, and June? How many units should be purchased in the second quarter in total