title: I want to make certain rows delete automatically based on age
body: <p>I am creating a spreadsheet and would like to have rows drop off automatically at a certain age. Is there a way to do this?
  My company submits engineering requests to our NY office, and I have created a job tracker to monitor the time from submittal to receipt of plans. My boss would like it if I can figure out how to make the data rows drop off after a certain time period. I've gotten all the formulas in for day counts and auto-updating with addition of new jobs, but I don't know how to go about this task.
  Thank you for any input!</p>