mr.montes is a plumber. he charges $35 to evaluate the situation plus $42 per hour that he is working on the job. if he were to lower his base fee by$10 and raise his charge per hour by $5,
You have to multiply 42x60 then add it to 35 then subtract the answer minus 10. Then multiply 60x5. Lastly you get both answers and add them I hope this is right
