Need Help pricing this decal Please

[Primal Rage Outdoors 0]

Okay I can do the work, but i am new to the pricing index, what would I charge for this graphic ? it measures 12"x16' and I got about an hour into it, it is 4 layer colored as well, thanks so much !

[Blues 18]

In my area about $25.00.

[Primal Rage Outdoors 0]

Thanks !