> Grocery stores have very small margins, as little as 1%.
Looking at the Kroger 2024 Annual report shows that they have 22.3% gross margin . they pay dividends, had a stock buy back, etc so its entirely possible that they had a very low margin but gross margin seems to be similar to a home builder.
Sales $ 147,123
Merchandise costs $113,720
Rent, Depreciation, Amortization $655
Gross profit $32,748
for a gross margin of 32.7/147 = 22%
The net margin of around 1.5% seems more relevant: the gross margin is just the revenue minus the cost of good sold plus cost of transportation. The net margin is the money you have left after paying things like Rent, employee wages, electricity, taxes, interest on debt.