“When a friend deals with a friend Let the bargain be clear and well penn’d, That they may continue friends to the end.”
~ Richard Saunders (BF), Poor Richards Almanack 
“When a friend deals with a friend Let the bargain be clear and well penn’d, That they may continue friends to the end.”
~ Richard Saunders (BF), Poor Richards Almanack
This is very important; otherwise, the friendship may not continue after the transaction.