8. Find the cost of levelling the playground

A ground is in the shape of a parallelogram. The height of the parallelogram is 18 $m$, and the corresponding base is 5 $m$ longer than its height. Find the cost of levelling the ground at the rate $₹$ 15 $per m²$.

 

 

The total cost of levelling the parallelogram-shaped ground is $₹$ .