Enrico owns a rooster farm, he sells each rooster for $0.50 per kilogram. He was able to sell a 30-kilogram rooster and a 40-kilogram rooster, how much money was he able to earn?
Enrico was able to sell the 30-kilogram rooster for 30 x 0.50 = $<T>multiply(30, 0.5)=15.0
And he was able to sell the 40-kilogram rooster for 40 x 0.50= $<T>multiply(40, 0.5)=20.0
Therefore, he was able to earn $20 + $15 = $<T>add(20, 15)=35
