Dragonball Leveling:
(Source:

)
100: +300% (0.33 Dragonballs to level)[Actual: 2] (Skip to 103)
101: +280% (0.35 Dragonballs to level)[Actual: 2] (Skip to 103)
102: +%[Assume: 260%] (0.38 Dragonballs to level)[Actual: 2] (Skip to 104)
103: +%[Assume: 240%] (0.41 Dragonballs to level)[Actual: 2] (Skip to 105)
104: +%[Assume: 220%] (0.45 Dragonballs to level)[Actual: 2] (Skip to 106)
105: +200% (0.50 Dragonballs to level)[Actual: 2] (Skip to 107)
106: +196% (0.51 Dragonballs to level)[Actual: 2]
107: +170% (0.58 Dragonballs to level)[Actual: 2]
108: +120% (0.83 Dragonballs to level)[Actual: 2]
109: +100% (1.00 Dragonballs to level)[Actual: 2]
110: +40% (2.5 Dragonballs to level)[Actual: 4]
111: +50% (2 Dragonballs to level)[Actual: 2]
112: +50% (2 Dragonballs to level)[Actual: 2]
113: +50% (2 Dragonballs to level)[Actual: 2]
114: +50% (2 Dragonballs to level)[Actual: 2]
115: +50% (2 Dragonballs to level)[Actual: 2]
116: +50% (2 Dragonballs to level)[Actual: 2]
117: +50% (2 Dragonballs to level)[Actual: 2]
118: +50% (2 Dragonballs to level)[Actual: 2]
119: +50% (2 Dragonballs to level)[Actual: 2]
[Since you always MUST use 2 Dragonballs at a time to level, all values are rounded up to the closest number divisible by 2]
Total (100-120): 34-42 DragonBalls
Thats...(If 2 are used daily, it would take 21 days to complete)
120: +100% (1 Dragonballs to level)[Actual: 2]
121: +95% (1.05 Dragonballs to level)[Actual: 2]
122: +65% (1.53 Dragonballs to level)[Actual: 2]
123: +60% (1.66 Dragonballs to level)[Actual: 2]
124: +50% (2.00 Dragonballs to level)[Actual: 2]
125: +50% (2.00 Dragonballs to level)[Actual: 2]
126: +40% (2.50 Dragonballs to level)[Actual: 4]
127: +30% (3.33 Dragonballs to level)[Actual: 4]
128: +30% (3.33 Dragonballs to level)[Actual: 4]
129: +20% (5.00 Dragonballs to level)[Actual: 6]
[Since you always MUST use 2 Dragonballs at a time to level, all values are rounded up to the closest number divisible by 2]
Total (120-130): 30 DragonBalls
Thats...(If 2 are used daily, it would take 15 days to complete)
Grand Total: 64-72 DragonBalls
Thats...(If 2 are used daily, it would take
36 days to complete)
NOTE: This numbers aren't exact, they are around the exact numbers.