Effie Company uses a periodic inventory system. Details for the inventory account for the month of January 2022 are as follows:

Units

	units	per unit price	total
balance, 1/1/22	200	$5.00	$1,000
Purchase, 1/15/22	100	5.30	530
Purchase, 1/28/22	100	5.50	550

An end-of-the-month (1/31/22) inventory showed that 160 units were on hand. How many units did the company sell during January 2022?

1. 160

2. 240

3. 60