Pivot Table Filter on Only Some Columns?

[CaptainAly]

Hello,
I am attempting to create a pivot table to view how sales trends have changed over time. My data appears as below.

Description	Period	Units Sold	$ Sold
Blue	Week 3	15	$55.20
Red	Week 3	12	$48.19
Yellow	Week 3	9	$62.00
Orange	Week 3	5	$33.58
Blue	Week 2	1	$17.60
Red	Week 2	7	$12.97
Yellow	Week 2	3	$52.36
Orange	Week 2	2	$9.78
Blue	Week 1	20	$65.30
Red	Week 1	13	$11.28
Yellow	Week 1	11	$42.67
Orange	Week 1	2	$39.22

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I would like to have one Pivot Table that has all of the Item Descriptions down one side (column A) then in subsequent columns have totals for different dates. Is there a way to filter only certain columns in a Pivot Table?

For example: Columns B&C would be Total Units and Total Sales for all data, then Columns D&E I would only want the Units and Sales for Weeks 2&3, then Columns F&G I would want only the Units and Sales for Week 3.

For now I have solved my issue temporarily by creating three separate pivot tables and inserting a Time Period Slicer on the other two. This is not a permanent solution for me because I have hundreds of Items in multiple categories and I would need the ability to expand and collapse categories and have them expand and collapse across all tables.

I am sorry if this is very primitive, I am completely self-Excel-taught and learning lots every day.

I am using Office 365 on a Mac.