L&L SkinCare's ending cash balance as of January 31, 2012 (the end of its fiscal year 2011) was $10,000. Its expected cash collections and payments for the next six months are given in the following table.

Month	Collections	Payments
February	$16,500	$19,400
March	18,300	20,800
April	22,700	21,600
May	29,100	24,300
June	32,500	26,700
July	36,000	27,200

a. Calculate the firm's expected ending cash balance for each month.

b. Assuming that the firm must maintain an ending cash balance of at least $9,000, how much must they borrow during each month?

c. If the firm must pay 5% annual interest on its short-term borrowing, how does this affect your ending cash balance calculations?

d. Finally, how would your ending cash balance change if the firm uses any cash in excess of the minimum to pay off its short-term borrowing in each month?

Please attach excel sheet with data/formulas and answer the short ended questions. Thanks!