Calculated field with pivot columns

I've got a worksheet that looks like this
``````YEAR |  ITEMNO | REVENUE
-----|---------|-----------------
2010 | number1 | \$5
2010 | number1 | \$6
2010 | number2 | \$10
2011 | number1 | \$6
2011 | number2 | \$9
2011 | number2 | \$6
2012 | number1 | \$8
2012 | number2 | \$10
``````
I put it into an excel pivot table so the results look like this
``````ITEMNO  | 2010 |  2011 | 2012
--------|------|-------|------
number1 | \$11  |   \$6  |  \$8
number2 | \$10  |  \$15  |  \$10
``````
I would like to add a calculated column to the right to calculate the difference between the revenue for of the years like this
``````ITEMNO  | 2010 |  2011 | 2012 | 10-11 Diff | 11-12 Diff
--------|------|-------|------|------------|------------
number1 | \$11  |   \$6  |  \$8  |    \$-5     |   \$2
number2 | \$10  |  \$15  |  \$10 |    \$5      |   \$-5
``````
Is this something that is possible? If so, how can I do this?
Microsoft Excel

Last Comment
David11011

8/22/2022 - Mon
nutsch

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helpfinder

do you mean something like that on my example?
sample.xlsx
SOLUTION
Rob Henson

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David11011