Simplify the following text for a Grade 7 native English-speaking person.
Original: The Ongar Railway Preservation Society entered a Â # 325,000 offer for the line , but Pilot Developments convinced London Underground to accept their slightly higher offer after the bidding deadline .
Simplified: Their offer was for Â # 325,000 . However , Pilot Developments made a slightly higher offer and got London Underground to accept it .