Final answer:
The estimated annual sales in cans of soda is 1,750 cans.
Step-by-step explanation:
To calculate the estimated annual sales in cans of soda, we need to determine the number of cans sold per day and then multiply it by the number of days in a year.
Big Al believes that 7 cans of soda will be purchased daily. So, the number of cans sold per week will be 7 * 5 = 35 cans. And the number of cans sold per year will be 35 * 50 = 1,750 cans.
Therefore, the estimated annual sales in cans of soda is 1,750 cans.