Mario spent a total of $87.33 last week but did not keep a perfect record of where his money went. Fortunately, Mario does have all but one of his receipts. He enters all of the information he has into his expense spreadsheet as shown below.
| | A | B |
|---|---------------|----------|
| 1 | Transaction | Amount |
| 2 | Oil change | $18.95 |
| 3 | Gas in car | $20.50 |
| 4 | Lunch out | $12.68 |
| 5 | Golfing | |
| 6 | Total Spent | $87.33 |
How much did Mario spend on golfing?
A. $35.20
B. $45.20
C. $47.88
D. $143.96
Answer (2)
Add up Mario's known expenses: $18.95 + $20.50 + $12.68 = $52.13 .
Subtract the sum of known expenses from the total amount spent: $87.33 − $52.13 = $35.20 .
Mario spent $35.20 on golfing.
The final answer is $35.20 .
Explanation
Understanding the Problem We are given the total amount Mario spent last week and the amounts he spent on an oil change, gas, and lunch. We need to find out how much he spent on golfing.
Setting up the Equation Let's denote the amount spent on golfing as x . The total amount spent is the sum of all expenses. Therefore, we can write the equation:
18.95 + 20.50 + 12.68 + x = 87.33
Calculating the Sum of Known Expenses Now, we need to solve for x . First, let's add the known expenses:
18.95 + 20.50 + 12.68 = 52.13
Substituting the Sum Now, substitute this sum back into the equation:
52.13 + x = 87.33
Solving for x To find x , subtract 52.13 from both sides of the equation:
x = 87.33 − 52.13
x = 35.20
Final Answer Therefore, Mario spent $35.20 on golfing.
Examples
Imagine you're planning a budget for a weekend trip. You know your total budget and have estimates for transportation, accommodation, and food. By subtracting these known expenses from your total budget, you can determine how much money you have left for activities and souvenirs. This simple budgeting technique helps you manage your finances effectively and avoid overspending.
Mario spent $35.20 on golfing. This was calculated by summing his known expenses and subtracting that total from the overall amount he spent. The corresponding answer is option A: $35.20.
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