A contract cleaning firm estimates that it will take 2,520 actual cleaning hours to clean an office block.Unavoidable interruptions and lost time are estimated to take 10% of the workers time.If the wage rate is $8.50 per hour,the budgeted labour cost will be:
A.$19,278 B.$21,420 C.$23,562 D.$23,800
Could you please kindly show me how u get to the answer to this question.