I'd suggest using what makes you feel confortable - considering what you may have to give away. Someone with 500 of'm might give 50 to someone for help. You have less than 100, and may give someone 10 for the same situation. No one will have a problem with whatever you'd like to give, and they most likely understand that you don't have a lot to give - so when you do give, say that 10 or 5, it'd probably mean as much to the recipient as someone with a lot more to give.
, you can't go wrong giving kudos however that make you feel right.
Here, have some. 8)