Answer:
Metro report as inventory 1100 units at 2,4 unit cost, to total cost of 2640
Step-by-step explanation:
if you put on a datasheet information:
date units unit cost total cost units available
1/1/x3 1000 1 1000 1000 initial
1/7/x3 600 3 1800 1600 purchase
1/20/x3 700 900 sale
1/25/x3 400 5 2000 1100 purchase
1/31/x3 2000 2,4 4800 1100 Final
4800 /2000 = unit cost in January = 2,4 x 1100 units= 2640