Early in 2014, Chien Company switched to a just in time inventory system. Its sales, cost of goods sold, and inventory amounts for 2013 and 2014 are shown below.

2013 2014
Sales $3,112,256 $3,750,000
Cost of goods sold 1,213,556 1,444,633
Beginning inventory 181,776 212,251
Ending inventory 212,251 108,987
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(a1)

Determine the inventory turnover for 2013 and 2014. (Ro