A. To calculate the number of laptops the school will have this year after increasing the number by 15%, we can use the formula:
\[ \text{New laptops} = \text{Old laptops} \times (1 + \text{Percentage increase}) \]
In this case, the old number of laptops is 200, and the percentage increase is 15% (or 0.15).
\[ \text{New laptops} = 200 \times (1 + 0.15) = 200 \times 1.15 = 230 \]
So, the school will have 230 laptops in total this year.
B. To find the total cost for the laptops, we multiply the number of laptops by the cost per laptop:
\[ \text{Total cost} = \text{Number of laptops} \times \text{Cost per laptop} \]
Given the number of laptops is 230 and the cost of each laptop is $800:
\[ \text{Total cost} = 230 \times 800 = 184,000 \]
Thus, the total cost for the laptops will be $184,000.