A hardware shop owner is setting up his store before opening and hangs a sign advertising: 1 for 10 cents, 15 for 20 cents and 110 for 30 cents. What is he selling?
(In reply to
re(3): Solution by Penny)
"I'll make it up on volume" is a common misconception.
No it is fact--fixed costs versus variable costs. (This is what "breakeven analysis" is all about.) I hope I can refrain from teaching fundamental economics here.
As for the others two points, you are taking the wording too literally.