July $1$ Sold $$20,000$ of computers to Robertson Company with terms $\frac{3}{15},\frac{n}{60}.$ Perez uses the gross method to record cash discounts. Perez estimates allowances of $$1,300$ will be honored on these sales. $($Perez records these estimates at point of sale.$)$

$10$ Perez received payment from Robertson for the full amount owed from the July transactions.

$17$ Sold $$200,000$ in computers and peripherals to The Clark Store with terms of $\frac{2}{10},\frac{n}{30}.$

$30$ The Clark Store paid Perez for its purchase of July $17.$