Count how many customers I have and organize in sections for me

Job ID: 33837115

Budget: $10 – $30 CAD

Hello, I have a excel file with over 25,000 entries in it. Its organized in one section by date of install. This is my customer call list over the last 3 years. I'm wanting to count how many individual clients I've had over this time frame. I have a lot of double entries so its a lot for me to look through to count the exact #! Would like to have another page on my excel file to organize each client by type of job.

categories will be
AC
Install
HWT
Furnace or furn
re & re

Need a accurate job done and has to be done by the end of Sunday June 5th!

message me if interested!
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