A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
See https://www.dropbox.com/s/spwzzdu9vdq57wp/Donation-analysis.xlsx?dl=1
I created dynamic named ranges for the x-values and each of the four series, then edited the source data of the chart to use these named ranges. You can view the definition of the names by selecting Formulas > Name Manager.