Walker Company prepares monthly budgets. The current budget plans for a September ending inventory of 42,000 units. Company policy is to end each month with merchandise inventory equal to a specified percent of budgeted sales for the following month. Budgeted sales and merchandise purchases for the next three months follow. (1) Prepare the merchandise purchases budget for the months of July, August, and September. (2) Compute the ratio of ending inventory to the next month's sales. (3) How many units are budgeted for sale in October