Month

Demand

Regular Production

Subcontract

$($Units$)$

$1$

January

$900900$

$660660$

$240240$

$2$

February

$700700$

$540540$

$160160$

$3$

March

$800800$

$630630$

$170170$

$4$

April

$1$ comma $2001,200$

$630630$

$570570$

$5$

May

$1$ comma $5001,500$

$660660$

$840840$

$6$

June

$1$ comma $1001,100$

$600600$

$500500$

Part $5$

The total regular production costequals$=$$ enter your response here. $($Enter your response as a whole$$ number.$)$