Time to do some investigation and problem solving.
Open the spreadsheet 'Adventure Land Mistakes'. You will remember this is the ticket sales sheet you worked on previously, however on this spreadsheet there are 5 mistakes. Some of the mistakes have produced an error message on the screen, some however have not, which means you will need to search for them. You must first find the 5 errors that have been made. When you have found them all you must next try to correct them. Remember to enter test data to see if you have found the correct solution.