This is an example Linear programming with scalar variables and affine functions of ODMO program. 
 $$
\begin{align}
    \underset{x,y}{\min} & \quad a_1 x + a_2 y \\
    \text{s.t.} & \quad b_1 x + b_2 y \geq c \\
    & \quad d_1 \leq x \leq d_2 \\
    & \quad e_1 \leq y \leq e_2
\end{align}	
$$ 
 [Set]  appropriate values   below to describe your problem.