I unfortunately don't know the amount; I gave 5 flowers to a person while receiving 5 from another (the whole "give 5 flowers to the person above you" thing), but when I went to Esther to turn in the tokens I got - they weren't there. I checked my inventory and there were no coins. Also, the number of coins in my currency bank did NOT increase. I probably should have checked my inventory first, I'm doing that from now on to make sure they don't disappear. I wish I could pinpoint the amount, but I didn't count how many I got, but usually when giving and receiving 5 flowers each, I get a total around 65 to 80 coins.