The only difference between what the electrician used to charge and what he/she charges now is an increase of $5. Therefore, instead of charging $40 he is now charging $45. Using this new information we can create the following equation to calculate the total cost of a job. We do this by multiplying the cost per hour ($45) by the total number of hours (h) and then adding the surcharge.
To find the average you would add the three numbers together 169.74+235.95+219.21 to get a total of $624.90 divide that number by 3 to get the average which is $208.30 as the average sale per day
