This is not enough; 27 Slots of Miniguns if sold in the Gun Shop = 202500 + 7,500,000 = 7,702,500 27 Slots of Miniguns if bought in the Gun Shop = 405000 + 7,500,000 = 7,905,000 In conclusion; You are missing about 1.3 (1.1 too) Million more cash items or just cash in general for this upgrade.