Timekeeper tool adds up a list of time ranges

Programmed this a while ago as a great time saver for working out hourly charges.

Instructions:

• Input ranges like this: hh:mm-hh:mm, one per line
• Use 24 hour time
• The list may contain other text before and after the date range (ie I use this format: "dd.mm.yy hh:mm-hh:mm job description")
• Copy and paste the columns to excel etc.