But it should be pointed out that those numbers are in the context of a quote from ~1958. Back then, postage was $0.04. Also, $4.58 and $12.82 (as examples) would be worth $40.52 and $113.41 today. So I'm not actually sure if a 6% charge on sales would be worth it here. I don't know what the cost of labor would have been back then (assume minimum wage in that area in 1958 maybe). Anyway, the point is the numbers don't seem as alarming and obvious to me after looking up postage and inflation at the time.