Summarising data

I have a spreadsheet that shows columns which have three lines of heading:
Name
Account number
Customer code

The rows are totals for each month
June
July
Aug
etc

How do I quickly swap this spreadsheet around so that the dates become columns and the data in the columns become rows e,g,

                                                            Jun            Jul            Aug

`[Fred Bloggs]  [B102]  [139/7642]        1032.45     239.73      9623.75

etc?

Many thanks

Jeremy