Does the cash budget based on the given parameters provide the firm with the liquidity in needs in meeting operations for the quarter (and why)?

Cash Collections Schedule
		May	June	July	August	September
Sales		$ 15,000	$ 16,000	$ 18,000	$ 24,000	$ 28,000
Cash	30%	$ 4,500	$ 4,800	$ 5,400	$ 7,200	$ 8,400
Credit	70%	$ 10,500	$ 11,200	$ 12,600	$ 16,800	$ 19,600
A/R Schedule
From credit sales		May	June	July	August	September
	May	$ 2,100	$ 7,350	$ 1,050
	June		$ 2,240	$ 7,840	$ 1,120
	July			$ 2,520	$ 8,820	$ 1,260
	Aug				$ 3,360	$ 11,760
	Sept					$ 3,920
Total Cash Collections		$ 2,100	$ 9,590	$ 11,410	$ 13,300	$ 16,940
Cash Sales		$ 4,500	$ 4,800	$ 5,400	$ 7,200	$ 8,400
Total Cash Collected		$ 6,600	$ 14,390	$ 16,810	$ 20,500	$ 25,340

What is the impact of interest rate changes on the a) the budget as proposed, and b) the CFOs request for higher minimum cash balance?