Campaign expenses include consultants, advertising, office space and utilities plus such things as brochures, mailings, bumper stickers and yard signs. What follows is an approximation of what Maryland candidates have paid for the following items.

Advertising: Most statewide candidates spend most of their money on television, particularly in the Baltimore area. Many are spending $25,000 to $50,000 a week for TV ads in Baltimore. Favorite times for media buys include the morning news shows plus the early and late evening news and some prime-time shows.

In the Baltimore market, current prices range from $500 for 30 seconds during "Good Morning America" to $4,400 for "60 Minutes" or "Dynasty" to $7,500 for "The Cosby Show." Thirty-second ads just before or after the evening news shows can range from $500 to $2,100. Ads for most prime-time shows range from $2,500 to $4,000. Advertising in the Washington market is slightly higher.

Currently, politicians must pay the going rate for TV advertising. After July 26, or 45 days before the Maryland primary, rates for political advertising will drop.

Eight-page direct mailing of 50,000: Approximately $25,000, including first-class postage.

5,000 vinyl bumper stickers: $350 to $1,000, depending on the number of colors used.

5,000 yard signs: $2,000 to $2,500, depending on the number of colors used and quality of paper.

Office space, $1,000 a month and up, depending on the size and location.

Consultants: Financial disclosure forms for the first three months of 1986 show that statewide candidates spent from $7,000 to $45,000 for political consultants and from $15,000 to $21,000 for polling.