assistance please

A company had net income of $250,000. Depreciation expense is $25,000. During the year, Accounts Receivable and Inventory both increased $15,000 and $45,000, respectively. Prepaid Expenses and Accounts Payable both decreased $5,000 and $7,500, respectively. There was also a gain on the sale of equipment of $5,000. Calculate operating cash-flow (OCF). a. $270,000 b. $317,500 c. $207,500 d. $250,000