How to utilize an existing matrix data set with Zoho Reports

Hello

My company's budget is currently captured in an excel spreadsheet relating estimated or budgeted expenditures by various categories (column) across future dates (ie many columns). I would like to use Zoho to report on this data set summing and analyzing by not only the categories but also by date. As the data is already in a matrix and not database format ie one row per datapoint, how can I modify or use the Report tool to accomplish my reporting needs?

Thanks for any advice you can provide

Kirby