Final answer:
To find the total cost of 13 school books at R9.50 each, multiply the cost per book by the number of books, which equals R123.50. Hence, option B is correct.
Step-by-step explanation:
To calculate the total cost of 13 books at a price of R9.50 each, you will need to multiply the cost per book by the number of books. The equation for this calculation is:
Total Cost = Cost per Book × Number of Books
Total Cost = R9.50 × 13
When you perform the multiplication, you get:
Total Cost = R123.50
Therefore, option B) R123.50 is the correct answer.