The following information is available for Blue Spruce Corp. for three recent fiscal years.
2017
2016
2015
Inventory $545,441 $570,212 $333,435
Net sales 1,953,922 1,736,880 1,290,976
Cost of goods sold 1,564,507 1,305,533 944,111
Calculate the inventory turnover, days in inventory, and gross profit rate for 2017 and 2016.