Marigold Company uses a periodic inventory system. Details for the inventory account for the month of January, 2020 are as follows: Units Per unit price Total Balance, 1/1/20 220 $6.00 $1320 Purchase, 1/15/20 120 5.50 660 Purchase, 1/28/20 120 5.50 660 An end of the month (1/31/20) inventory showed that 210 units were on hand. How many units did the company sell during January, 2020