Answer:
The weighted average cost per unit (rounded) for May is 4.
Explanation:
total cost = 900*$3.40 + 1000*$3.60 + 1200*$3.70 + 800*$3.80
= 3060 + 3600 + 4440 + 3040
= $14140
total units = 900 + 1000 + 1200 + 800
= 3900
weighted average cost per unit = total cost/total units
= 14140/3900
=3.63
Therefore, The weighted average cost per unit (rounded) for May is 4.