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.
Absorption costing, on the other hand, blurs the lines. Say your company manufactures a certain product. Producing one unit requires $5 worth of raw materials, $2 in direct labor and $1 in variable manufacturing costs, such as electricity to run the machinery.