Hi Biff!
Okay, the SUMIF works well, but it won't work for my application...I've made a big mess of things by not asking the right questions, and by trying to shortcut the explanation of what I really need. Let's go into it backwards this time: First off, the Trip Report submitted by a member (pilot) contains the flight#, hours-flown and aircraft info that looks something like this: 5 Merlin III 425/41. (5) Is the aircraft inventory#, (425) is the billing-rate per hour for that plane, and (41) is the fuel-burn per hour for that plane.

We have a number of members (pilots) and I need to keep a record of flights each pilot has flown, okay? So there are separate sheets for (let's say) Bob, Sue, Jim, Fred, and so on, and this grows as we add new pilots. When a Trip Report comes in from Sue, I go to her sheet and enter the Flight#, hours-flown, billing-rate, and fuel-burn (each flight she makes is a new row)...from that I do all the other math for revenue, fuel-cost, and other summaries. This all works okay, but what's missing is the accumulation of aircraft-time, no matter who flies it or how often they fly it.

Obviously I could do what I'm doing now (go to their log sheet and enter the data), then go to a separate sheet and log the aircraft# and flight-time again, but this is duplicated efforts which invites entry error.

The ultimate goals: (1) Reduce the number of steps required to enter Trip Report data, and (2) Accumulate aircraft-time regardless of who flies it or how or how often they fly it.

Again, if you want to see the actual spreadsheet, I'm glad to provide it.

Thanks,
Garry )