Choose the correct description of variable and fixed costs. OA. A variable coat is related to a particular con object and can be roed to it in an economically tatible way, such as the cost of bel in the manufacturing of a wory car. A red cost is related to particular cout object but cannot be traced to in economically way, such as the story of a plant manager who oversees production of many different types of sury care produced at the same plant On A variable cost is considered to be a unit cost such as the perde cost of hiring a musical group to perform at an event. A five coat is considered to be a total cost auch as the total fee paid to them group for performing at the event Oc. A variable cost changes in total in proportion to changes in the related level of total activity or volume, such as a sales commission that is a percentage of each sales revenue dollar Afeed cost remains unchanged in total for a given time period, despite wide changes in the related level of total activity or volume, such as a food annual leasing cost of a machine OD. All of the above