1.You have just received an invoice from one of your suppliers, and you notice that in addition to the amount owed, it is marker "3/15, NET 30". What does this mean?

a.You receive a 3% discount if you pay in full within 30 days.

b.You will receive a store credit of 15% if paid in 3 days, otherwise it is due in 30 days.

c.You will receive a penalty of 3% for every 15-day period after 30 days for the unpaid balance.

d.You receive a 3% discount if the invoice is paid within 15 days, and the whole amount is due in 30 days.