Solve this problem using $\text{'}*$pen and paper$*\text{'}($not step by step$)$

The following data refers to a certain portion of a proposed road. Calculate the volume of filling using Trapezoidal and Prismoidal formulas.

$\backslash$table$[[$Chainage $($ft$),$Height of Filling $($ft$),$Transverse Slope$],[0,6,1$:$10],[50,8,1$:$7],[100,10,1$:$8],[150,9,1$:$6],[200,5,1$:$5],[220,7,1$:$9],[240,6,1$:$7],[260,8,1$:$5]]$

Width of formation $=20ft.$ Side slope $=1$:$1$