well, mrs. wang, you must be aware that an irrevocable letter of cred it gives the exporter the additional protection of the bank er's guarantee. we always require l / c for our exports. and the other way round, we pay by l / c for our imports.
still, there will be bank charges in connection with the credit. it would help me greatly if you would accept d / a or d / p. you can draw on me just as if there were a letter of credit. it makes no great difference to you, but it does to me.