We then subtract the cost of goods sold ($126,520 m) from total revenues ($144,077 m) to obtain a gross profit of $17,577 m. To obtain the gross profit margin, we divide the gross profit ($17,577 m) by total revenues ($144,077) for a margin of 12.20%.
Outer ear. The outer ear is the external portion of the ear, which consists of the auricle (also pinna) and the ear canal. It gathers sound energy and focuses it on the eardrum (tympanic membrane). Contents.
The outer ear also contains the ear canal and the ear drum (tympanic membrane). The middle ear: is the area behind the ear drum. This part of the ear is made of three movable bones called ossicles. The function of these three bones is to convert the sound wave (by striking the eardrum) into mechanical vibrations.