Fixed vs Variable Costs. Fixed vs variable, fully allocated, average, marginal and incremental, each of these cost definitions address the need to understand a different facet of production. Fixed costs do not vary with the number of units produced. Variable costs change with production. For example, the rent paid on a factory would be a fixed cost.
mourn. 1  to feel or express sorrow; lament; grieve. 2  to grieve for someone who has died; specif., to manifest the conventional signs of such grief, as by wearing black clothing or a mourning band. 3  to make the low, continuous sound of a dove.
Elegy is the kind of poem that mourns the death of someone or something. Tennyson's In Memoriam mourns the death of his friend Arthur Hallam. Oliver Goldsmith's the Deserted Village is about the demise of a Village.