Dollar General has close to 20,000 stores across the US. Here's how it keeps prices so low.

• More Americans are shopping at discount stores as the cost of goods soars. 
• Dollar General sells items at 20% to 40% less than full-price retailers, with most under $10.
• Its no-frills stores with few staff and limited product assortment help keep costs down.

More Americans are shopping at discount chains as inflation bites and the cost of goods soars. 

Dollar General, one of the best-known discount chains, is growing rapidly and now has more than 19,000 stores across the US.