6. Find the cost of painting the window shade

The window sunshade is in the form of an isosceles trapezium whose parallel sides are 156 $cm$ and 72 $cm$ and the distance between them is 26 $cm$. Find the cost of painting the surface at a rate of $₹$13 per $cm²$.

 

 

The total cost of painting the window sunshade $=\ ₹$.