I had planned to do a quick late Dec trip to get my MQDs over the Gold threshold, but an upcoming business trip ended up being a little more expensive than I thought. But (since I first did an incorrect currency conversion...) I was still $74 short....I bought up to C+ (this is a trip to China, where Business was $10,000, so that wasn't going to happen....)

I agree that if it's domestic I'd look for FCM, but for international, this worked for me. At least- I really hope my calculations are correct! I'll know after next week (well, I'll know the MQDs for this trip, which was purchased by Chinese colleagues - the next China trip in December I bought, so I know the MQDs already)