A company's forecast of demand in shown in the following table. Regular production costs $148 per unit with a monthly capacity of 51 units. Subcontracting costs $281 per unit and has unlimited capacity. It costs $10.3 per unit per month to hold inventory and $39 per unit per month to run backlogs.

What is the total cost of holding inventory using a LEVEL aggregate plan?

Period	1	2	3
Forecast	66	76	89