This is how I want it done.
Lets say you are a chunin and your starting stats are 20
Chakra: 5
Strength: 5
Speed: 5
Intelligence: 2
Agility/handsign: 1
This are your BASE stats. Or starting stats
Now, lets say you are an assassin and a medical ninja
*Assassin-
Gains: +3 Speed +2 Agility
*Medical-
Gains: +3 Intelligence +2 Chakra
Chakra: 5 + 2 = 7
Strength: 5 = 5
Speed: 5 +3 = 8
Intelligence: 2 +3 = 5
Agility/handsign: 1 +2 = 3
These are your CLASS STATS and the ones in blue are your TOTAL.
You have to set the stats up like this with the + signs and the total so we can see what is gained.