Acme Company offers in writing to sell Tech Corporation
1k computers for a total of $1,000,000 and state that it will keep the offer
open for 7 days. On the fourth day, Tech
sends an acceptance to Acme via next-day mail, but the acceptance is misdelivered
and Acme does not receive it until after the 7-day period expires.
Uses reasonable means under the circumstances. Get mailbox rule so there is a contract as soon as the acceptance is sent.