Both inlays and onlays are pre-formed in a lab before being bonded to the damaged or decayed tooth. The difference of use depends on the amount of tooth structure that has been lost to wear or decay. Your dentist will help you decide which is most appropriate for you.
Predetermined overhead rate is a rate used to charge overhead cost to jobs in production; the rate is established in advance for each period by use of estimates of total manufacturing overhead cost and of the total allocation base for the period.redetermined overhead rate is a rate used to charge overhead cost to jobs in production; the rate is established in advance for each period by use of estimates of total manufacturing overhead cost and of the total allocation base for the period.
The manufacturing overhead cost applied to the job is, therefore, not actual manufacturing overhead cost incurred by the job. The reason is that the total actual manufacturing overhead costs are usually not known to managers before the end of the year. The application of manufacturing overhead based on a predetermined overhead rate helps in computing cost of goods sold of a particular job before it is shipped to the customer. The use of predetermined overhead rate to apply manufacturing overhead cost to products or job orders is known as normal cost system.