EXTRA Dating:

Be sure to pay attention to the days $($discount & net$)$ within the terms. Be sure to enter a $ sign and show two decimal places.

$13.$ An invoice dated July $11$ with terms of $3/10-60$X$,$ net $90$ accompanied a shipment of vests that cost $$3,900.$ If the invoice is paid on September $19$:

A$.$ What is the $ Cash Discount?

B$.$ What is the amount due?