That might explain it, no doubt there have been many changes over the years.Let me add this conversation occurred over 40 years ago. Maybe things have changed since then.The first figure in the Stern's spreadsheet is Gross Margin, which is the relationship between Net Sales and the Cost Of Goods Sold (COGS), in this case COGS is the cost to the retailer to purchase the goods. It excludes all the expenses/costs you mention. A 53% GM is roughly a 2X markup.
If she said they markup their purchases by 10X she either made a mistake or was having a bit of fun.
There are other columns in the spreadsheet that list other costs & expenses.
Cheers,
Doug
