robert company makes three models of sandals, all of which require the use of special macine .only 200 hours of machine time are availsd per month . data for the three products are as follows . roberts can sell all of the product it can make.

walker runner trekker

selling price 30. 40. 56

variable cost 16. 22. 28

cntribtin mrgin 14. 18. 28

machine time. 6. 10. 15

a. if all products required the same amount oh machine tomr , which products should roberts make ?

b.given the capacity constraint , determine which product roberts should make and what total monthly contribution margin roberts would earn by making only that product .

c. how much would the selling price next most profitable ( per machine hour ) product have to rise to be as the product you selected in requirement B ?