dollar tree

Based: Chesapeake, Va.

Sales: $5.9 billion

Stores: 4,335

Minnesota stores: 68

Going up: Opened 882 stores from 2006 to 2010.

family dollar

Based: Matthews, N.C.

Sales: $8 billion

Stores: More than 7,100

Minnesota stores: 69

Going up: Plans to add 450 to 500 stores nationwide this year.

dollar general

Based: Goodlettsville, Tenn.

Sales: $13 billion

Stores: More than 9,800

Minnesota stores: 16

Going up: Plans to add 625 stores nationwide this year.