The Production Manager of Dame Enterprises Plans to Have an Inventory

The production manager of Dame Enterprises plans to have an inventory on hand at the end of each month that will equal 150% of the next month's sales. This requirement was met at the end of February. A sales budget for the four months ending June 30th is as follows:
$$\begin{array} { | l | r | } \hline \text { Month } & { \text { Units } } \\\hline \text { March } & 30,000 \\\hline \text { April } & 50,000 \\\hline \text { May } & 80,000 \\\hline \text { June } & 40,000 \\\hline\end{array}$$
Required:
Prepare a production budget for April and May.