Do you still have any of the containers? If so, empty 1 & photograph it. Then photo all of the other containers, leaving them full. Your insurance adjuster will appreciate having those photos. To calculate the # of yards, fold a 1 yard piece the size of the bottom of the container & measure how high it is. Then divide that # by the height of the 1 yard piece. That's your yardage! Remember to add sales tax to the cost & use an average per yard of about $12.50. That's from a retired property adjuster.