Bramble Corporation opened a new store on January $1,2024.$ During $2024,$ the first year of operations, the following purchases and sales of inventory were made:

$\backslash$table$[[$Purchases$,$Sales$],[$Date$,,$Units,Cost per unit,Date,,Units,Price per unit$],[$Jan$.,5,11,$$$1,000,$July,$4,14,$$$2,000$