Metlock, Inc. 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 270 $5.00 $1350 Purchase, 1/15/2022 140 4.80 672 Purchase, 1/28/2022 140 5.00 700 An end of the month (1/31/2022) inventory showed that 220 units were on hand. If the company uses FIFO and sells the units for $9 each, what is the gross profit for the month? $2970 O $1332 $1980 O $1638