Variable

$\backslash$table$[[$E$,80\mathrm{.}00000],[$S$,120\mathrm{.}00000],[$D$,0\mathrm{.}00000]]$

Constraint

$1$

$2$

$3$

Variable

E

S

D

Constraint

Value

Slack$/$Surplus

$0\mathrm{.}00000$

$0\mathrm{.}00000$

$320\mathrm{.}00000$

Allowable

Increase

$12\mathrm{.}00000$

$31\mathrm{.}00000$

$24\mathrm{.}00000$

Allowable

Increase

$\backslash$table$[[1,200\mathrm{.}00000],[2,320\mathrm{.}00000],[3,2400\mathrm{.}00000]]$

Reduced Cost

$0\mathrm{.}00000-0\mathrm{.}00000-24\mathrm{.}00000$

Dual Value

$31\mathrm{.}00000$

$32\mathrm{.}00000$

$0\mathrm{.}00000$

Allowable

Decrease

$15\mathrm{.}50000$

$8\mathrm{.}00000$

Infinite

Allowable

Decrease

$40\mathrm{.}00000$

$120\mathrm{.}00000$

$320\mathrm{.}00000$

$40\mathrm{.}00000$

$120\mathrm{.}00000$

$320\mathrm{.}00000$

If available hours for fan motors increases to $240,$ the objective function value will increase $-$ more dollars.

$0$

$1240$

$1280$

None of other choices