Depending on how long you're vegging them before starting 12/12 photoperiod, I'd say you're right on target.
That's about what I average per plant in the same size cans.
I veg them until they're about 12" to 14" tall, since I'm a little bit restricted on height, and with a 600, the lower buds get kind of larfy if they are grown too tall.
Lately, I've switched to LST for all my girls, so I could possible veg them a little more, but that depends on how stretchy the strain is, too.
Still, with 2 months of flowering, that's 6 harvests a year. @ 10-oz per harvest = 60-oz a year (12-oz per harvest would be 72-oz a year, 14-oz would net 84-oz a year).
I recalculated my cost per oz, and figure it costs me about $10 per oz, once things get rolling non-stop.