Nash's Trading Post, LLC uses a periodic inventory system. Details for the inventory account for the month of January 2022 are as follows: Units Per unit price Total Balance, 1/1/2022 220 $4 $880 Purchase, 1/15/2022 110 4 440 Purchase, 1/28/2022 110 4 440 An end of the month (1/31/2022) inventory showed that 180 units were on hand. How many units did the company sell in January 2022? O 260 O 70 O 220 O 180