Final answer:
To find Mr. San's total purchase cost including a 7% sales tax, we calculated the total cost of items before tax ($37.88), then determined the sales tax ($2.65 after rounding), and finally added them together to reach a total of $40.53.
Step-by-step explanation:
Mr. San bought 2 magazines for $9.99 and 2 books for $8.95 each. If the sales tax is 7%, we need to calculate the total cost of his purchases including tax. To find the total cost before tax, we simply add the cost of the magazines and books:
- Cost of magazines: 2 x $9.99 = $19.98
- Cost of books: 2 x $8.95 = $17.90
- Total cost before tax: $19.98 + $17.90 = $37.88
Next, we calculate the sales tax by converting the percentage to a decimal and multiplying it by the total cost before tax. Then, we add the sales tax to the total cost before tax to find the final total cost.
- Sales tax rate as a decimal: 7% = 0.07
- Sales tax amount: 0.07 x $37.88 = $2.6516
- Round total sales tax to the nearest cent: $2.65
- Final total cost: $37.88 + $2.65 = $40.53
Therefore, the total cost of Mr. San's purchases, including a 7% sales tax, is $40.53 when rounded to the nearest cent.