Table:
0
A
B
C
D
1
Year Ended
2
April 26, 2019
April 27, 2018
April 28, 2017
3
Number of shares repurchased
29
15
22
4
Average price per share
72.87
51.57
32.72
5
Aggregate purchase price
2111
794
705
6
Remaining authorization at end of period
1889
4000
794

Questions and formulas:
Question: What was the change in the average price per share between 2017 and 2018?
Formula: C4-D4
Formula2: C4-D4
Level: Calculation