The Aggregate plan for a product family is given below. What is the total available production time in period $6$ if each worker works $8$ hours per day and $20$ days per month?

Period, t

Hired

LaidOff

Workforce Size

Overtime $($hours$)$

Inventory

Stockout

Subcontract

Total Production

Demand

$0$

$0$

$0$

$80$

$0$

$1,000$

$0$

$0$

$1$

$0$

$16$

$64$

$0$

$2,560$

$0$

$0$

$2,560$

$1,000$

$2$

$0$

$0$

$64$

$0$

$2,120$

$0$

$0$

$2,560$

$3,000$

$3$

$0$

$0$

$64$

$0$

$880$

$0$

$0$

$2,560$

$3,800$

$4$

$0$

$0$

$64$

$0$

$0$

$1,220$

$140$

$2,560$

$4,800$

$5$

$0$

$0$

$64$

$0$

$0$

$660$

$0$

$2,560$

$2,000$

$6$

$0$

$0$

$64$

$0$

$500$

$0$

$0$

$2,560$

$1,400$

Question $4$ options:

$640$

$10240$

$9600$

$60$