Solution of a Minimization Model $($Example $4)$

Consider the following LP model:

Minimize $,z=0\mathrm{.}3x_1+0\mathrm{.}9x_2$

Subject to:

$x_1+x_{2}800$

$0\mathrm{.}21x_1-0\mathrm{.}30x_{2}0$

$0\mathrm{.}03x_1-0\mathrm{.}01x_{2}0$

$x_1,x_{2}0$