Pam's Custom Catering has sales of $219,000.00, depreciation of $11,000.00, and net working capital of $15,000.00. Pam's Custom Catering has a tax rate of 35% and a profit margin of 8%. The firm has interest expense of 4,500.00. What is the amount of the operating cash flow? a) $31,640.00 b) $33,020.00 c) $57,800.00 d) $13,520.00 e) $43,520.00