Beginning inventory, purchases, and sales data for prepaid cell phones for May are as follows: Inventory$-$ May $1.4000$ units at $$20.$ Purchases on May $10$ and $20.2000$ units at $$22$ and $1800$ units at $$24$ respectively. Sales on May $12,14,$ and $31$ had $2800$ units, $2400$ units, and $1200$ units respectively. Please fill out the table accordingly based on the screenshot.