Select all that apply WhiWhat is the definition of total cost? Multiple choice question. The sum of the variable costs at each level of output The sum of all resource costs used to produce a good or service The average of all resource costs used to produce a good or service The sum of the fixed costs at each level of outputch of the following are types of resources that require more time for a firm to adjust? Multiple select question. Size of the factory Raw materials Hourly labor Amount of specialized machinery