Please explain the process on how to compute accounts receivable turnover

The company's income statements for the years ended December 31, 2017 and 2016, follow. Assume that all sales are on credit:

For Year Ended December 31 2017 2016 Sales $ 673,500 $ 532,000 Cost of goods sold $ 411,225 $ 345,500 Other operating expenses 209,550 134,980 Interest expense 12,100 13,300 Income taxes 9,525 8,845 Total costs and expenses 642,400 502,625 Net income $ 31,100 $ 29,375 Earnings per share$1.90$1.80