The incubation period averages 8-12 hours, after which diarrhea and abdominal cramps begin. C. perfringens symptoms usually persist for one day. A severe complication, necrotic enteritis (also known as pig-bel syndrome), can develop if large numbers of bacteria are ingested.
Variable costing is a costing system under which those costs of production that vary with output are treated as product costs. This would usually include direct materials, direct labor and variable portion of manufacturing overhead. Fixed manufacturing cost is not treated as a product costs under variable costing.
Variable selling and administrative costs are critical components in both variable and absorption accounting calculations. Variable costs such as commissions, bonuses and utility bills vary based on product production and sales for the period, whereas fixed costs do not tend to fluctuate. Variable selling and administrative costs also must be distinguished from variable manufacturing costs, which often have similar account names.