Melody is purchasing the following:
A Ring of Protection +1 (to boost AC) - 2000gp
A six pack of Cure Light Wound potions (d8+1 ea) - 300gp
Two scrolls of Glitterdust (2nd) - 300gp
Scroll of Mage Armour(1st) - 25gp
Scroll of Levitate (2nd) - 150gp
Scroll of Protection from Arrows (2nd) - 150gp
Total: 2925gp
And her UMD skill should be +10 (+2 CHA and +8 from the Headband)
