How can I Merge these Final ERD's into a simpler one with fewer attributes? Please I need help.

Customer Consignment Customer ID List Line number Line Reward Code Line # (FK) ( List Customer First Name Line number Staff First Name Start Price Customer Last Name Description Staff Last Name low price Rewards Description Start Price + Sub Total Category code adress Category cost Rewards Discount Category cost Discount Percentage GST Email Total Customer type ID Phone Customer type Description Line number Line Type Name Tranning ID(PK) ) Type Name#(PK Staff ID List -04 Description Staff First Name + Type Name (FK Start Date Staff Last name Type ID End Date > Item 3 Pass/fall