Show data depending on a yes or no.

Please see attached workbook. In Sheet 1 (Drivers), there are a list of incidents and costs of said incidents. This information shows in Sheet 2 (Summary) as a simple count of incidents and costs per driver.

In column L on Drivers tab, there is a Yes/No dropdown box. I need to make sure that only data that is marked 'Yes' goes through to the summary sheet. Currently I have it set that the sheet will count everything.