James decides to make a bathtub full of jello.  For every pound of water, you need 1.5 tablespoons of jello mix.  The bathtub can hold 6 cubic feet of water.  Each cubic foot of water is 7.5 gallons.  A gallon of water weighs 8 pounds.  A tablespoon of jello mix costs $0.50.  How much did he spend to fill his tub?
The tub has 6*7.5=<<6*7.5=45>>45 gallons
That would weigh 45*8=<<45*8=360>>360 pounds
So he needs 360*1.5=<<360*1.5=540>>540 tablespoons of jello mix.
So he spent 540*.5=$<<540*.5=270>>270
#### 270