How to shade rows to group information together visibily

[Pumpk1n]

I have data which has variable numbers of rows for each practice. I'd like all the same practice rows to have the same shading. For example, Amber and Associates has 2 rows of data; Pacific Rim has 4 rows of data and Zipper has one row of data. I've done every other row shaded, but that isn't accomplishing what I needed to do. Thanks in advance!

 

[Rick Rothstein]

How many different practices could there be maximum?

 

[Eric W]

Try:

Book1
	A	B	C
1	Name	Date	Amount
2	Amber & Associates	1-Jan	10
3	Amber & Associates	2-Jan	20
4	Pacific Rim	3-Jan	30
5	Pacific Rim	4-Jan	40
6	Pacific Rim	5-Jan	50
7	Pacific Rim	6-Jan	60
8	Zipper	7-Jan	70
9	Tuna Farm	8-Jan	80
10	Tuna Farm	9-Jan	90
11	Company 2	10-Jan	100
12
Sheet5

Cells with Conditional Formatting
Cell	Condition		Cell Format	Stop If True
A2:C20	Expression	=MOD(SUM(--($A$1:$A1<>$A$2:$A2)),2)*($A2<>"")	text	NO

 

[Pumpk1n]

How many different practices could there be maximum?

It's variable. Right now, there's 150 rows of data. The max number of practices could be 150.