a$.$ What would the costs be to continue to follow the 'historical plan'? $[$ Select $]["$$$232,100","$$$175,500","$$$195,000","$$$234,200","$$$233,400","$$$215,000"]$

The operations manager is considering a second plan.$$ In this scenario, the plant will increase regular time production to $600$ units per month for the first $3$ months $($January$-$March$),$ then drop to $530$ units for the last three months.$$

b$.$ What is the cost of the second plan?$[$ Select $]["$$$231,900","$$$235,550","$$$241,050","$$$395,500","$$$241,450"]$

$$

The final plan $($which includes all costs and demands mentioned so far$)$ would be to produce $525$ units per month regular time, and out$-$source $($subcontract$)$ only when necessary to avoid any lost sales. $($the capacity of the subcontractor$$is $100$ units$)$

c$.$ What is the cost of plan $3?[$ Select $]["$$$243,950","$$$240,150","$$$259,750","$$$240,550","$$$246,150"]$

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d$.$ Based on costs, which plan should be chosen?