I can't believe they were that price then, unless it was a real loss leader. Back in the later 60s and early 70s I bought .22 LR (mainly CCI, sometimes Peters) in large wholesale case lots for about 50 cents per box. Back when I was in high school in the 1950s, .22 Shorts were about a quarter per box at the local general store. That's all I could afford. I think LRs were about .35/box.
".003 cents per round." More like 0.3 cents per round.
$1.39 per 500
i rounded up to .003 cents per round
$1.39 per 500
i rounded up to .003 cents per round