Simple algorithm: 1.6 times 45%, 2 times 4.5%, 0.12 times 4.5

Simple algorithm: 1.6 times 45%, 2 times 4.5%, 0.12 times 4.5

1.6 times 45 + 2 times 4.5 + 0.12 times 4.5
=1.6*45%+0.2*45%+45%*1.2
=(1.6+0.2+1.2)*45%
=1.35