Final answer:
Canadians spend $525,729.82 on sandwiches in one week by multiplying the daily expenditure of $75,104.26 by seven days.
Step-by-step explanation:
The student has asked how much Canadians spend on sandwiches in one week, given that they spend $75,104.26 on an average day.
To find the total weekly expenditure on sandwiches, we need to multiply the daily expenditure by the number of days in a week:
$75,104.26/day × 7 days/week = $525,729.82/week
So, Canadians spend $525,729.82 on sandwiches in one week.