What is 12 hours of $15 hourly a day , what if amount of his salary , on a year, his work of 19 years of making money ?

Multiply 12 times days in a year and you should get 4380. Then 

multiply 4380 by 15 which will give you how much he/she makes a year, 16700.

Finally multiply 16700 by 19 and your final answer is 1248300.