perpetual inventory system

Please record the entries for the inventory purchase transactions below (Perpetual Inventory System) 1. Apr1, business bought $6,300 inventory from the BNC Inc. Term 1/10, n/30 FOB 2. Apr 3, Business purchased $7,650 inventory from PPL's Inc. Term 2/15, n/30 FOB 3. Apr7. Business paid $150 shipping charges for the inventory purchased on Apr3 4. Apr 11, business paid BNC Inc in full 5. Apr 12, business found $270 defective units from the Apr3 purchase, returned them back to PPL's Inc. 6. Apr13, business bought $2,300 inventory from TriStar Inc. paid in Cash 7. Apr 25, Business paid PPL's Inc in full 8. Instead of paying PPL's Inc on Apr25, What would be the entry if the business was paying PPL's Inc on Apr 18