John and Phil have been in their respectlve businesses tor years. Phil runs a goif course and John runs a goif supply store. For years, on the tht of every month, John sends 50 boxes of goaf balls. If Phil rurs out, then variant orders are ploced throughout the month. in their original cantract, a clause provides that if John cannot supply a particular type of golf ball, then John wis be responsible for a sultable replacemant A fow times, John list waived the cost that month for the sutable replacements as he felt bod for the inconvenience. This month, Phil was given a suitable repiticement but asked if Phil could waive the cost John sald he cannot walwe the cost this month. if there is a conflict between the express terms of the centract and the post course of dealing between the parties. thes Multiple Crioice past course of dealing between the parties will preval. express terms of the contrect prevall. centract is voided. seiller is excused