Matt received a quote to move his belongings to his new house. The estimate from the mover is $815 for 8 hours of packing and 7 hours of moving. Matt thinks he can reduce his cost by doing some of the packing and moving himself. If he does, the cost will decrease to $615 for 5 hours of packing and 6 hours of moving. If the mover charges a set hourly rate for packing and another set hourly rate for moving, what are these hourly rates?