To clients, back when I was a freelance copywriter : $1-2 per.
To the commercial printers who ran the the jobs above : the paper they’re printed on; the price of ink.
To Twitter, currently : $7.7 Billion.
To pictures (ratio) : 1 to 1,000.
To academic publications : reputation x audience.
To my offspring, this morning : zip + squat.
To students, from teachers : more than it sometimes initially appears.
To me, based on hours spent, inspirational and training costs (academic & cultural fees, book & magazine purchases, etc.), and chocolate/coffee expenses divided by number of original ideas someone’s read and connected with : every blessed penny.