Nano, IncIs Preparing Its Budget for the Second Quarter Additional Information Follows

Nano, Inc.is preparing its budget for the second quarter.The following sales data have been forecasted:
$\begin{array}{l}&\underline{ \text { April } } &\underline{ \text { May } } &\underline{ \text { June } } & \underline{ \text { July } }&\underline{ \text { Allgust }} \\\text { Unit sales}&640 & 720 &780 & 620&660\\\end{array}$
Additional information follows:
$\begin{array}{ll}\text { Inventory on March } 31: & 192 \text { units } \\\text { Desired ending inventory each month: } & 30 \% \text { of next month's sales }\end{array}$ How many units should be purchased in April, May, and June? How many units should be purchased in the second quarter in total?