i have a roll of plastic garden mulch that i bought maybe 3 years ago. it was originally 4000' but i've used it to plant tomatoes and melons. i am now planting melons in it and i think i will need 600' more to finish. is there a way to tell if i have that much left on the roll? or do i have to go find out when i really bought it(it could have been more than 3 years ago)and then try to remember how much i've used? is weighing it the answer if i know how much a full roll should weigh?