Answer:
$4
Step-by-step explanation:
In Store A the price of mayonnaise went down from $5.82 to $5.23.
Total decrease in mayonnaise price in Store A = $5.82-$5.23 = $0.59
In Store B the price of mayonnaise went down from $8.77 to $2.43.
Total decrease in mayonnaise price in Store A = $8.77-$2.43 = $6.34
In Store C the price of mayonnaise went down from $8.71 to $3.64.
Total decrease in mayonnaise price in Store A = $8.71-$3.64 = $5.07
Cumulative decrease in mayonnaise price across all stores:
$0.59 + $6.34 + $5.07 = $12
Average decrease in mayonnaise price across all stores = [tex]\[\frac{12}{3}\][/tex]
= $4
