Final answer:
To buy both the Nintendo Switch Lite and a copy of the game, you will need to spend $284.90 with sales tax included.
Step-by-step explanation:
To calculate the total cost of buying both the Nintendo Switch Lite and a copy of the game, we need to find the sum of their individual prices and then add the sales tax. The Nintendo Switch Lite costs $199.00, and the game costs $59.99.
First, we add the prices of the two items together: $199.00 + $59.99 = $258.99.
Next, we find the 10% sales tax by multiplying $258.99 by 0.1: 0.1 x $258.99 = $25.899 (rounded to $25.90).
Finally, we add the sales tax to the total cost: $258.99 + $25.90 = $284.89 (rounded to $284.90).