PCB corporation manufactures a single product. Monthly production costs incurred in the manufacturing process are shown below for the production of 3, 879 units. The utilities and maintenance costs are mixed costs. The fixed portions of these costs are $388 and $259, respectively. Identify the above costs as variable, fixed, or mixed. Calculate variable costs per unit, variable cost per unit for utilities and variable cost per unit for maintenance. Exclude mixed costs in the calculation for variable cost per unit. (Round answers to 2 decimal places e.g. 2.25.) calculate the expected costs when production is 6, 465 units. (Round answer to 0 decimal places, e.g. 1, 225.)