I bought your worm for a fair sum and paid you cash on the spot.
A consumer may rationalize that if they have heard of a brand, the company must be spending a fair sum on advertising.
"Our site manager has been offered a fair sum of money on different occasions to open up that suite."
He had offered a fair sum, and you refused to sell.
Douglas talked to the landlord, and offered the man a fair sum to release Tel from his contract.
That's hardly high-tech, but it saves the families and the government a fair sum.
The Brangwens received a fair sum of money from this trespass across their land.
She asked for a "fair and reasonable sum" from her husband.
My father agreed with me that it was a fair sum to offer you.
Instead, a fair sum of money poured in at the box office.