Add new file

planning/ReadMe.md

+# Event Planning
+
+## Example Spreadsheet
+Each event and promotional activity must have a spreadsheet of projected costs where each line item is explicitly quantified. 
+
+https://docs.google.com/spreadsheets/d/1PCxWJzFF-e-7NX2MJWGZ4gH2LpWg42GSfXlWrHZMs3E/edit?usp=sharing