Answer:
Between $42 and $57
Step-by-step explanation:
The first step is to calculate the profit markup on the cost. Always remember that in a profit markup system, cost is always deemed 100%.
So
Profit mark-up = Cost * Mark-up percentage
Profit Mark-up = $30 * 40% = $12
The least Price of the job that the firm will charge is $42 ($30 Cost + $12 Profit Mark-up) and the highest charge for the job will be $57. So the company must charge between $42 to $57.