On January $1,2025,$ Cullumber Company granted Betty Harris, an employee, an option to buy $500$ shares of Cullumber Co$.$ stock for $$40$ per share, with the option exercisable for $5$ years from the date of grant. Using a fair value option pricing model, total compensation expense is determined to be $$5280.$ Harris exercised her option on September $1,2025$ and sold her $500$ shares on December $1,2025.$ Quoted market prices of Cullumber Co$.$ stock during $2025$ were:

January $1$ $$42$ per share

September $1$ $$50$ per share

December $1$ $$56$ per share

The service period is two years, beginning January $1,2025.$ As a result of the option granted to Harris, using the fair value method, Cullumber should recognize compensation expense for $2025$ in the amount of