Need to switch 2 columns with each other...please help

I have a spread*** that I started and someone else finished. It performs
calculations and works fabulously, but, on my spread*** my first column
(column A) is my "Sold" price and in column B, the "cost" price. I need to
switch columns and make column A the "Cost" column and column B the "Sold"
column. The columns are formatted somehow down to line 100 with its
"function" jobs to where all I have to do is put in the sold and cost prices
and it will calculate how much the salespeople made, the manager made, the
buyer and the senior buyer also made. How can I switch the columns and still
get all my columns to calculate properly. Thanks very much in advance for
any and all help.
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