Install two way clean out outside of building And run auger through clean out Upon arrival customer made me aware that they had a mainline blockage at first I attempted to run auger through after pulling toilet in the hall, I gave the customer upfront pricing for that and multiple options we ended up having to install a two way clean out and clear the blockage from there due to a cross of cast-iron being in between the toilets, I was successful in clearing the block made the customer aware that If this happens again in the future he is going to want to have the line Hydro jetted because I did find large amounts of sludge. After clearing the blockage and testing the clean out everything is functioning properly Nick pleasants Hillsborough,no