When Kevin bought a new computer, he borrowed $1,200 at a rate of 8% for 3 years. How much simple interest did he pay?

si=prt

=1200×0.08×3

=288

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