Credit terms

Can someone explain wha the following mean? Credit terms for customers of 1/10, net 30. Credit terms for customers of 1/10, net 20. THanks

get 1% discount if the bill is paid within 10 days, no discount (net) if paid in 30 days get 1% discount if the bill is paid within 10 days, no discount (net) if paid in 20 days

1% discount paid within 10 days, etc., none thereafter

Which LOS is this on? Never saw this on CFA or schweser. Thanks.

Sure you saw it, CFAi text, volume 4 Corporate Finance, page 120

Thanks map.