Lvl 50 = 15,000 xp Lvl 26 = 4,800 xp 10,200 xp needed. 10,200 ÷ 100 = 102. 102 badges needed. 102 × $0.30 = $30.60. TLDR; it'll take you ~$30, if you buy sets for 30¢ each. Those sets are hard to find, so ~$40.