Calculating Areas of Multiple Polygons

Each unit on the coordinate grid represents
1 yard.
The rectangular pool and triangular hot tub shown are both in need of covers.
How much total material is needed to cover both?
square yards

the answer is 29

Step-by-step explanation:

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540