Multiple Choice Question 78 Waterway Company uses a periodic inventory system. Details for the inventory account for the month of January, 2020 are as follows: Total $1000 Balance, 1/1/20 Purchase, 1/15/20 Purchase, 1/28/20 Units Per unit price 250 $4.00 100 5.40 100 5.70 540 570 An end of the month (1/31/20) inventory showed that 230 units were on hand. How many units did the company sell during January, 2020? 220 O 130 230 200