I dont know the formula

I put 7600 and it is wrong answer. please help

[Niagara College 09/2022] HOTL9308 Hospitality Management Accounting - Section 3 Dashboard / My courses / [Niagara College 09/2022] HOTL9308 Hospitality Management Accounting - Section 3 / CHAPTER 7 - Flexible Budgeting and Variance Analysis / Chapter 7 Post-Class Homework Take me to the text Brianna budgeted that she would use 2,500 labour hours in her department at an hourly rate of $16 per hour. However, the accounting records show 2,800 hours at $17 per hour. What is the labour cost variance? Do not enter dollar signs or commas in the input boxes. Round your answer to the nearest whole number. Labour Cost Variance $ Note: The "check" button does not submit your attempt. To submit the attempt, go to the end of the quiz and click on the "submit all and finish" button