In each column on Page 1 of an Excel spreadsheet, I am listing a number of variables from A4 to A64. Each column is identified by a number in cell A1

The contents of each column will translate into allotted positions in a letter on Page 2.

I would like the contents of those allotted positions to change depending on the identifier number in cell 1 of each column, much like a Mail merge record,
so that if the letter had an identifier number of, say 245, the allotted positions will be filled by the data in column 245.