A Company Makes Cylindrical Cans of Radius R and Height $2 \pi r ( \mathrm { cr } \pm \mathrm { dh } )$

Short Answer

A company makes cylindrical cans of radius r and height h at a cost of a cents per unit area for the top and bottom and b cents per unit area for the side. Express the cost of producing a can as a function of the two variables r, and h.
Enter your answer in the form: $2 \pi r ( \mathrm { cr } \pm \mathrm { dh } )$