Is there a formula you can use when bidding for only string trimming/edging. I'm in the process of bidding a Parkway that run 1.4 miles long, with sidewalks and medians that need to be edged and string trim. I am wondering is there a formula you guys use to help with building. I read somewhere on this forum that it take 3600/FT/Hour to Edge, havn't found one for string trimming. Is this formula right or are there other formulas out there? if so, can you please share. Have to turn bid in on the 22nd of March. Thanks for your help. God Bless!!