2/10. n/30 is interpreted as O a 30% discount if paid within 10 days Ob 10% cash discount if the whole amount is paid within 2 days the balance is due in 30 days OC 30% discount if paid within 2 days Od 2% cash discount if the whole amount is paid within 10 days, the balance is due in 30 days O e 2% discount if paid within 30 days On December 5, Z-Mart purchased $1 800 worth of merchandise On December 7, Z-Mart returned $800 worth of merchandise On December 8, it paid the balance in full after taking a 2% discount. The amount of the payment was a $200 b 51.000 c $1.500 d $980 e $1 800