Calculus- Optimization- cost of placing fencing parallel to x-axis is $2 and y-axis is $3 find the dimensions?

The Coordinates want to create a rectangular enclosure with an area of 20units^2. The cost of placing fencing parallel to the x-axis is $2 and the cost of placing fencing parallel to the y-axis is $3. Find the dimensions of the enclosure, which minimizes the total cost.