2. Krash Symbol's sales were as follows for the months indicated: Nov Dec Jan Feb Mar Apr Sales (units) 2,000 2,500 1,100 1,500 2,000 2,200 Each month's desired ending inventory was 50% of the following month's sales. Each unit cost $15.00 to purchase and was sold for $26.00. Payment for each month's purchases was made in the following month. Required: Calculate total purchases in units (first) then dollars for January, February, and March. Also calculate the amounts of (a) ending inventory in dollars (b) accounts payable at the end of March, and the amount of cost of goods sold for each month