XYZ Company incurred the following costs for the month of August when it observed an activity level of 5,000 units: Variable costs $32,500; Fixed costs $25,000; Mixed costs $21.500, Total costs $79,000. During October, the activity level was 16,000 units, and the total costs incurred were $178,000. If the activity level were expected to be 10,000 units for the month of December, what amount of total costs would be expected? Select one a. $151,000 O b. $133,000 C. $142.000 d. None of the answers given Oe. $124.000