If you are called to a resi just for gutter clean out you should be charging by the foot and it should include down spout flushing. $1 a ft and if its 2 story it should be a little extra for the height. ALWAYS PRATICE SAFTY WHEN WORKING OFF LADDERS AND ON ROOFS, AND INJURY CAN TAKE YOU OUT OF THE GAME COMPLETELY, COSTING YOU MORE THAN MONEY.
If your doing a fall clean up,(leaf clean up and removal) gutter clean out should be included. Plant beds are not extra either, they are a part of the lawn.
These are common practices with-in my area.