Bayest Manufacturing Corporation uses a predetermined overhead rate based on direct labor-hours to apply manufacturing overhead to jobs. Last year, the Corporation worked 56,500 actual direct labor-hours and incurred $372,000 of actual manufacturing overhead cost. The Corporation had estimated that it would work 60,200 direct labor-hours during the year and incur $343,140 of manufacturing overhead cost. The Corporation's manufacturing overhead cost for the year was:

Four key marketing decision variables are price (p), advertising (a), transportation (t), and product quality (q). consumer demand (d) is influenced by these variables. the simplest model for describing demand in terms of these variables is: d = k – pp + aa + tt + qq where k, p, a, t, and q are constants. discuss the assumptions of this model. specifically, how does each variable affect demand? how do the variables influence each other? what limitations might this model have? how can it be improved?