Chapters, a bookseller, had the following transactions during the month of July $2022$ and uses the perpetual inventory system.

$\backslash$table$[[$Date$,$Transaction,Purchases,Sales,Balance$],[,,$Quantity,Cost,Quantity,Cost,Quantity,Cost$],[$Jul $1,,,,,,0,$$$0],[$Jul $1,$Bought $20$ novels at $$32$ each.,$20,$$$32,,,20,$$$32],[$Jul $2,$Bought $25$ bags at $$47$ each.,,,,,$20,$$$32],[,,25,$$$47,,,25,$$$47$