The average weight of the pies is 104.83g.
The increase in the mean for the second week compared to the first week is $0.60.
Mean is the average of a set of numbers. It is determined by adding the numbers together and dividing it by the total number
Mean = sum of the numbers / total number
Average weight of the pies = 105 + 106 + 108 + 103.5 + 102 + 104.5) / 6 = 104.83g
Mean for the first week = (12.48 + 9.5 + 10.25 + 4.99 + 8.59) / 5 = $9.16
Mean for the second week = $9.16 + ($3/5) = $9.76
Difference = 9.76 - 9.16 = $0.60
To learn more about mean, please check: https://brainly.com/question/25842202
#SPJ2