Tamarisk, Inc. uses a periodic inventory system. Details for the inventory account for the month of January 2017 are as follows: Balance, 1/1/2017 310 Purchase, 1/15/2017 160 Purchase, 1/28/2017 160 Units Per unit price Total $5.0 $1550 880 912 6 An end of the month (1/31/2017) inventory showed that 250 units were on hand. How many units did the company sell during January 2017? 250 310 380 90