Answer: $33,440
Step-by-step explanation:
First find the units to be produced for the year:
= Forecasted demand + Closing inventory - Opening inventory
= 18,000 + 900 - 660
= 18,240 units
Cost of production:
= 18,240 * 22
= $401,280
Cost per month:
= 401,280 / 12
= $33,440