Hello there!
Remember that she makes $7 per hour, so multiply this by the number of hours she works to get the total amount she earned.
Monday: $7 per hour x 5 hours worked = $35 earned on Monday
Wednesday: $7 per hour x 7 hours worked = $49 earned on Wednesday
Friday: $7 per hour x 4 hours worked = $28 earned on Friday
Now, add everything up.
35 + 49 + 28 = 112
So, she made 112 dollars in total, making C your answer. I hope this was helpful and have a great rest of your day!