Supply Drop Ability is the final upgrade on Path 2 for the Sniper Monkey in Bloons Tower Defense 5, costing $10200 on Easy, $12000 on Medium, $12960 on Hard and $14400 on Impoppable. When used, this ability summons an Operation: Dart Storm plane (which does not attack) to drop a small crate with a banana symbol on it, identical to the crates produced by the Banana Research Facilty. It contains a random amount of money between $500 and $1500; the player must hover their mouse cursor over the crate to collect the money from the crate. When purchased, this ability must go through a 60-second chargeup before use, probably to prevent placing x/4 Snipers, selling them, and buying them to use the ablity again and again.
As the money that can be earned from the Supply Drop Ability in a round is not fixed, longer rounds like Freeplay in combination with this ability will earn more than Banana Farms.