Do market economies operate on the principle of supply and demand?

Bridge building company estimates that it will incur $1,200,000 in overhead costs for the year. additionally, the company estimates 50,000 direct labor hours will be spent building custom walking bridges for the year at a total direct labor cost of $600,000. what is the predetermined overhead rate for bridge building company if direct labor costs are to be used as an allocation base?

Which of the following commission structures creates sales people who are highly motivated to close a sales,because their entire income depends on it?

What strategy was used to rescue illinois prairie chickens from a recent extinction vortex? what strategy was used to rescue illinois prairie chickens from a recent extinction vortex? establishing a nature reserve to protect its habitat determining the minimum viable population size by taking into account the effective population size introducing individuals from other populations to increase genetic variation reducing the population size of its predators and competitors?