Three delivery options are presented: $1$ day delivery transportation cost is $$65,2$ day delivery transportation costs $$62,$ and $3$ day delivery transportation costs $$60.$ In$-$transit holding cost is $$800$ per year. Assume $365$ days per year. Which option should be selected to minimize total delivery cost?

Multiple Choice

a$.$Either $1$ or $2$ days. Cost is equal.

b$\mathrm{.}1$ day

c$\mathrm{.}3$ days

d$\mathrm{.}2$ days