Here is a more updated version of SHOPPING FRENZY for the curious, it includes the Donuts, Skill Points or Item you receive for each deed completed!
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Heroic Deeds - Shopping Frenzy List
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Shopping Frenzy I 100 coins spent a day Item
Shopping Frenzy II 500 coins spent a day 3 Skill Pts
Shopping Frenzy III 1,000 coins spent a day 2 Donuts
Shopping Frenzy IV 2,500 coins spent a day Item
Shopping Frenzy IV 5,000 coins spent a day 4 Donuts
Shopping Frenzy V 7,500 coins spent a day 6 Skill Pts
Shopping Frenzy VI 10,000 coins spent a day 5 Donuts
Shopping Frenzy VII 25,000 coins spent a day Item
Shopping Frenzy VIII 50,000 coins spent a day 6 Skill Pts
Shopping Frenzy IX 75,000 coins spent a day 4 donuts
Shopping Frenzy X 100,000 coins spent a day 6 Skill Pts
Shopping Frenzy XI 250,000 coins spent a day Item
Shopping Frenzy XII 500,000 coins spent a day 6 Donuts
Shopping Frenzy XIII 1,000,000 coins spent a day Item
Shopping Frenzy XIV 2,000,000 coins spent a day 6 Donuts
Shopping Frenzy XV 3,000,000 coins spent a day Item
Shopping Frenzy XVI 4,000,000 coins spent a day 8 Donuts
Shopping Frenzy XVII 5,000,000 coins spent a day 9 Skill Pts
Shopping Frenzy XVIII 7,500,000 coins spent a day Item
Shopping Frenzy XIX 10,000,000 coins spent a day 9 Skill Pts
Shopping Frenzy XX 15,000,000 coins spent a day 8 Donuts
Shopping Frenzy XXI 20,000,000 coins spent a day Item
Shopping Frenzy XXII 25,000,000 coins spent a day Coins
Shopping Frenzy XXI 30,000,000 coins spent a day 9 Skill Pts
Shopping Frenzy XXIV 35,000,000 coins spent a day Exp
Shopping Frenzy XXV 40,000,000 coins spent a day Item
Shopping Frenzy XXVI 45,000,000 coins spent a day Coins
Shopping Frenzy XXVII 50,000,000 coins spent a day 9 Skill Pts
Shopping Frenzy XXVIII 55,000,000 coins spent a day Exp
Shopping Frenzy XXIX 60,000,000 coins spent a day Item
Shopping Frenzy XXX 65,000,000 coins spent a day Coins
Shopping Frenzy XXXI 70,000,000 coins spent a day 9 Skill Pts
Shopping Frenzy XXXII 75,000,000 coins spent a day Exp
Shopping Frenzy XXXIII 80,000,000 coins spent a day Item
Shopping Frenzy XXXIV 85,000,000 coins spent a day Coins
Shopping Frenzy XXXV 90,000,000 coins spent a day 9 Skill Pts
Shopping Frenzy XXXVI 95,000,000 coins spent a day Exp
Shopping Frenzy XXXVII 100,000,000 coins spent a day 20 donuts
I hope it helps