Changing data types of individual cells

Hi! I was wondering how to change the data type of specific cells in Knime. I am creating an Excel report that has multiple tables in one sheet, and so my idea was to create it all in Knime as one table with subsections but it causes numbers to be formatted as strings whenever I put a header as a row in the table.

If anyone has any experience with creating dense reports in one sheet with Knime that would be wonderful. Thanks!