SSRS Expression Month at a glance

I have a report that I am trying to regress the payment sums out month by month. I know how to do this in SQL, but no idea in SSRS. Below is what I would like the table to look like.

Year                             Month                  Total Payments       Month1            Month2             Month 3

2012                              1                       10,000.00                2000.00          2000.00            6000.00

                                     2                       15,000.00                5000.00           1000.00           9000.00

And this would go on. I have the report built to drill down by year and month and show the sum of the payments. What I can not figure out is how to break out the payments collected month by month. I hope this makes sense.