Midland company buys tiles and prints different designs on them for souvenir and gift stores. it buys the tiles from a small company in europe, so at all times it keeps on hand a stock equal to the tiles needed for three months’ sales. the tiles cost $1.00 each and must be paid for in cash. the company has 26,000 tiles in stock. sales estimates, based on contracts received, are as follows for the next six months: january 12,000 february 17,000 march 12,500 april 13,600 may 9,100 june 6,300 required: a. & b. estimate purchases (in units) and cash required to make purchases in january, february, and march.