1 Onset of sleep from time the lights were turned off; this is called  sleep onset latency  and normally is less than 20 minutes. ( 2 Note that determining sleep and awake is based solely on the EEG. Patients sometimes feel they were awake when the EEG shows they were sleeping.
The direct cost margin is calculated by taking the difference between the revenue generated by the sale of goods or services and the sum of all direct costs associated with the production of those goods, divided by the total revenue.
Select an injury type from the drop-down menu OR enter the total workers' compensation costs. Enter the profit margin (leave blank to use default of 3%). Enter the number of injuries (leave blank to use default of one). Select Add/Calculate to compute the total direct and indirect costs.