Well, going with a much-more-reasonable but-apparently-still-somewhat-generous 64 square feet per cubicle and $40/sq. ft./year, we come out with 80x64x$40 = $204,800/year for cubicles and...well, let's just add half that again for manager offices and walkway space (acknowledging that these are luxuriously large manager offices, given that they're including 64 sq. ft. that would be part of a cubicle). So call it $307,200/year for their offices.
That leaves plenty of room for operating expenses and salaries and the like. Profits could be pretty significant, depending how much the operating expenses are. As a total-guess ballpark figure, let's pretend it's $3 million/year for operating expenses. Things like server maintenance, replacement parts, new computers, office supplies, travel expenses, advertising, etc. So we're at $3.31 million/year costs before employee salaries, out of $9.6 million/year revenue. $6.29 million left to pay salaries and account for any profits.
$6.29 million divided by 80 employees, if we assume they just had salaries and no profits, would be $78,625/year in salaries. Actually rather high, but perhaps not for an average salary when one includes management. Cut another $1million out as estimated profits, just for grins, and average employee salary comes out to about $66,125/year. I don't know CoL in CA, but that's fairly decently middle class, I think.