Coded Farecards containing $8 worth of train rides on the Washington Metro are being sold at outlets through the suburban Maryland area.

Metro riders who want their Farecards to have more or less than $8 in them can buy cards for any amount between 40 cents and $20 from vending machines in all Metro stations.

The $8 is an arbitrary amount chosen for ease of handling. The amount is equal to what it would cost for 20 minimum-fare subway rides of 40 cents each.

Metrobus tickets in 13 different denominations are also available at most outlets listed below plus various other locations across the area.

Here are some of the locations where coded Farecards can be purchased in sururban Maryland, according to Metro.

Prince George's Metrobus Division, 4421 Southern Ave., Coral Hills, 7 a.m. to 7 p.m., everyday.

Suburban Trust Co. offices at 8767 Georgia Ave., Silver Spring; 4411 S. Park Ave., Chevy Chase; 6505 Belcrest Rd., Hyattsville; 3413 Kenilworth Ave., Hyattsville; 5214 Baltimore Ave., Hyattsville; 6495 New Hampshire Ave., Hyattsville; 5416 Queens Chapel Rd., Hyattsville; 3716 Rhode Island Ave., Mt. Rainier, all between 8:30 a.m. and 2 p.m. Monday through Friday;

5710 Riverdale Rd., East Riverdale; 7370 Baltimore Ave., College Park; 103 Centerway, Greenbelt; Brightseat and Landover Road, Landover; Rte. 197 Old Chapel Rd., Bowie; 7515 Annapolis Rd., Lanham; 4743 Marlboro Pike, Coral Hills; 2324 Iverson St., Hillcrest Heights; 5410 Indian Head Highway, Oxon Hill, 6800 George Palmer Highway, Seat Pleasant; 4831 Silver Hill Rd., Suitland, all between 8:30 a.m. and 2 p.m. Monday through Friday;

7316 Wisconsin Ave., Bethesda; 10400 Old Georgetown Rd., Bethesda; 8722 Flower Ave., Silver Spring; 7950 New Hampshire Ave., Langley Park; 11800 Rockville Pike, Rockville; 13311 New Hampshire Ave., Colesville; 8252 Georgia Ave., Silver Spring; 6950 Carroll Ave., Takoma Park; 10151 Colesville rd., Silver Spring; 2601 University Blvd., Wheaton; 11499 Columbia Pike, White Oak, and 12210 Viers Mill Rd., Silver Spring, all between 8:30 a.m. and 2 p.m., Monday through Friday.

Commerce bank, 4650 East-West Hwy., 9 a.m. to 5 p.m. Monday through Thursday, 9 a.m. to 7 p.m. Friday and 9 a.m. to noon Saturday.