The cost of the can the powder comes in is proably higher than the cost of making the powder in the can, if truth were told. Markup is a trade secret, but 400% and higher would not be unheard of. This is true with many consumer goods. I worked for a Potatoe Chip company years ago when I was in Law School, and the company stopped producing 5 cent bags of chips when the packaging cost more than the small amount of chips in each bag. The first summer I worked for the company, you could only buy the 5 cent bags if you bought a package of 10, designed to be put in lunch pails and boxes for little kids. The next summer, even those were gone, and the cheapest bag of chips cost $.10 !
The only way companies stay competitive is by mass production, which cuts the unit cost down to almost nothing. That is the way they can transfer price paid to paying for expensive labor, and employee benefits.