MIN: $20$X$1+15$X$2+10$X$3$

Subject to:

$20$X$1+15$X$2+10$X$3<=100$

$20$X$1+0$X$2+0$X$3>=10$

$0$X$1+15$X$2+0$X$3>=15$

$0$X$1+0$X$2+10$X$3>=10$

$20$X$1,15$X$2,10$X$3>=0$ b$.$ Implement the model in a spreadsheet and solve it$.$ Do the sensitivity report with it$.$