Determine the total cost for this plan given the following forecast:

$\backslash$table$[[$Month$,1,2,3,4,5,6],[$Forecast$,380,400,420,440,460,480]]$

Use steady regular output of $400$ units per month, use overtime as needed for up to $40$ units per month, and use subcontracting to make up any needed output to match the forecast. Unit costs are:

Regular output $=$$$25$

Overtime $=$$$40$

Subcontract $=$$$60$

Average Balance Inventory $=$$$15$