Final answer:
Brian bought 8 chicken sandwiches at $2.43 each, so he owes the cashier a total of $19.44.
Step-by-step explanation:
To calculate how much money Brian owes the cashier for the chicken sandwiches, we need to multiply the number of sandwiches by the price of each sandwich. Brian buys 8 sandwiches at $2.43 each.
The total cost is calculated as follows:
Total cost = Number of sandwiches × Price per sandwich
Total cost = 8 × $2.43
Total cost = $19.44
Therefore, Brian owes the cashier $19.44 for the 8 chicken sandwiches he purchased at McDonald's.