Try This,
In Power BI, click Transform Data to open Power Query.

Find the two affected columns (List price, Selling price, or whichever ones are misbehaving).

Right-click the column header, then choose the following

Change Type > Using Locale...

In the popup choose below

Choose Data Type: Decimal Number

Choose Locale: English (United States) (or any locale that uses a period as decimal separator)

Then Click OK