What would 42m (4200cm) cost at $0.05 per cm? Would it be 4200*5=21000?
42000cm @ 5 cents per cm = 42000(.05) = $2100
This makes sense....at 10 cents per cm we would have (1/10) of a dollar
So (1/10) of 42000 = $4200......but we have half of this (5 cents per cm....)
If I'm correct it should be unless you Times it 0.5.
But that should be correct.