Planet Light First (PLF), a producer of energy-efficient light bulbs, expects that demand will increase markedly over the next decade. Due to the high fixed costs involved in the business, PLF has decided to evaluate its financial performance using absorption costing income. The production-volume variance is written off to cost of goods sold. The variable cost of production is $2.30 per bulb. Fixed manufacturing costs are $1,160,000 per year. Variable and fixed selling and administrative expenses are $0.35 per bulb sold and $290,000, respectively. Because its light bulbs are currently popular with environmentally conscious customers, PLF can sell the bulbs for $9.60 each. PLF is deciding among various concepts of capacity for calculating the cost of each unit produced. Its choices are as follows: (Click the icon to view the capacity information.) Read the requirements. Requirement 1. Calculate the inventoriable cost per unit using each level of capacity to compute fixed manufacturing cost per unit. Begin by determining the formula to calculate the inventoriable cost per unit. (Abbreviations used: mfg = manufacturing, admin. = administration.) = Inventoriable cost per unit