Problem $8$:

$20$ Points

Given the following linear optimization model, transform the constraints into the required

algebraic form. Enter into the required optimization template and solve using Solver.

OpenSolver

Objective function: $,8\mathrm{.}2A+7\mathrm{.}0B+6\mathrm{.}5C+9\mathrm{.}0D=$ Minimum Cost

Constraints:

$6A+2B+5C+7D820$

$\frac{A}{A+B+C+D}0\mathrm{.}3$

$\frac{B+C}{A+D}0\mathrm{.}2$

$CA+D$