Answer
Price of each small cap = $9
Price of each medium cap = $8.44
Price of each large cap = $7.20
Explanation
Price of each cap = (Total price of the caps in that group)/(Total number of caps in that group)
For small caps
Total price of the caps in that group = $180
Total number of caps in that group = 20
Price of each small cap = ($180/20) = $9
For medium caps
Total price of the caps in that group = $270
Total number of caps in that group = 32
Price of each medium cap = ($270/32) = $8.4375 = $8.44
For large caps
Total price of the caps in that group = $360
Total number of caps in that group = 50
Price of each medium cap = ($360/50) = $7.20
Hope this Helps!!!