DST covers 2/3 of the work-year, or approximately 160 work days. So it buys us 160 hours of extra evening light. (I'm not counting weekends, because then the distinction between the hour lost of morning light and that gained of evening light is immaterial.) That means we're paying $0.01 each per hour of evening light. I'll take that deal.
In truth, I find that DST sucks for about 3 days, but after I've adjusted, I'm very glad it's there. I'm not a dairy farmer, though.