S Agrees to Sell B 10,000 Widgets at a Price

S agrees to sell B 10,000 widgets at a price of $1 per widget.After B breaches the contract,S resells the widgets for $1.10 per widget in a public sale.S also saved $200 in shipping costs.What amount does S owe B?

A) $1,200
B) $1,300
C) $1,000
D) Nothing