Room Core Upgrade (4) - (4-3)*100 DP = 100 DP Room Core Upgrade (5) - (5-3)*100 DP = 200 DP I'll be buying that.
Dungeon Core, Room Core Upgrade (4) and (5), 2 Numb Traps, 1 Dumb Trap, 7 Rats, 1 Slime and 1 Lizard. 50+100+200+80+40+70+20+20=580 Should cost me all my money.
Purchasing: Dungeon Core - 50 DP Party Core Upgrade (3) - 100 DP Lizard (8x) - 160 DP Mysterious Vines (4x) - 160 DP Self-confirmed.
I would like to buy a Rusty Spear and Rusty Gauntlets. Current Total: 580 DP Rusty Spear: -200 DP Rust Gauntlets: -50 DP Resulting Total: 330 DP