The president of Hill Enterprises, Terri Hill, projects the firm's aggregate demand requirements over the next $8$ months as follows:

is called plan $A.$

The cost of laying off workers is $$75$ per unit. Evaluate this plan. $($Enter all responses as whole numbers.$)$

Note: Both hiring and layoff costs are incurred in the month of the change. For example, going from $1,600$ in January to $1,500$ in February incurs a cost of layoff for $100$ units in February.

The total cost of hirings $=$$ $($Enter your response as a whole number.$)$

The total cost of layoffs $=$$ $($Enter your response as a whole number.$)$

The total inventory carrying cost $=$$ $($Enter your response as a whole number.$)$

The total stockout cost $=$$ $($Enter your response as a whole number.$)$

The total cost, excluding normal time labor costs, is $=g($Enter your response as a whole number.$)$