Inventory at the start of the year was 775 planters. The desired inventory of planters at the end of each month should be equal to 25 % of the following month's budgeted sales. Each planter requires three pounds of polypropylene (a type of plastic). The company wants to have 20% of the polypropylene required for next month's production on hand at the end of each month. The polypropylene costs $ 0.20 per pound.