Within the accounts payable ledger of The Shoe Closet, a retail store, there are accounts for a number of suppliers as of the tnd of October, 20X1. One of these, Leather Sourcing, displays a beginning balance of $8.100, a purchase invoice for $4,300 on 10/5, a purchase invoice of $5,200 on 10/9, a credit memorandum of $1,200 on 10/77, a credit memorandum of $3,000 on 10/22, and a purchase involce of $1,200 on 10/30. What is the ending balance within the accounts payable ledger account of Leather Sourcing on 10/31