The cost to repair is based on hours of work ($50 per hour)
nd the total cost for repair this week is reduced by $20 according to the offer.
Using the formula: C = 50 h - 20
we can find the total cost of a repair that takes 6 hours by doing:
C = 50 (6) -20 = 300 - 20 = 280
So the repair job will cost $280