Home / Support / Donate / Rocky Mountain Rivalry Make a donation to Mandarins! The 2022 Drum Corps Season is in Full Swing! However, current diesel fuel cost per gallon is almost double what we budgeted for, the California average is $6.91 per gallon and the nationwide average is $5.73 per gallon. Gasoline is also double what we budgeted for, the California average is $6.24 per gallon and the nationwide average is $4.97 per gallon. Food costs are running 25% higher then we budgeted for. Everything is more expensive! Literally everything we purchase to feed the Drum Corps is more expensive than anticipated. Donate today, and help us compete with the Troopers and Blue Knights in the Rocky Mountain Rivalry, and support the Mandarins!