I think the key here is to look for a relationship type that allows for cascading deletes. The question mentions deleting a Supplier record and all associated Supplier Item__c records, so a master-detail relationship seems like the most logical choice.
Clarence
5 months agoCharlesetta
5 months agoShawn
5 months agoAzzie
5 months agoAaron
6 months agoJoesph
6 months agoPrecious
6 months agoLeanora
6 months agoAnglea
6 months agoTrinidad
6 months agoDick
6 months agoPaulina
6 months ago