Transform Data on Columns with Changing Names

Hi there,

I have an Excel spreadsheet which exports from another source. We will export the Excel file to the same location every time, then refresh the report. I need to Change the Type of some columns, but the column names from one export to the next will change. There are some columns which are named the same every time. Is there a way to identify the columns I want Power BI to change the type for other than manually selecting the Columns by name?

For example, my Excel column headers in today's export have the following names, with an example of the values that would follow.

Next month when we export it, the Excel column headers which contain the dates will likely be different. It does not always shift by exactly one month though, as shown in my example. It could be any month or year in the future.

Regardless of which month or year it is, I need those columns to have a data type of Fixed Decimal. I do not want to manually choose which columns Power BI updates every time we refresh.

Thank you for any help you can offer!