ROT - thanks for that. Initially I was working in decimal time e.g. converting 45' to .75 hr. This was for the sole purpose of automatically calculating a running total for my flying costs (just a cross check).
Then I found that any decimal part relates to the decimal part of a day. Now if I fly 10:05 to 10:55 (50 mins e.g. L4-K4), then multiply that by 24 (a constant to bring 50 mins to a decimal of an hour, then multiply by the hourly rate, all is ticketty-boo!
------------------
If you're not on the edge, then you're taking up too much space.