HOW CAN I COUNT ALL THE GROUPS IN A REPORT

Hi guys please help me.

Below is my report

S/n Hours CODE

1 -------4------------A
2--------8------------B
3--------12-----------C
4--------3.5----------A
5--------1.1----------A


I want my report to group and count the value

A=3
b=1
c=1


Thank you guys in advance.