Assuming that all other factors remain unchanged, determine how a firm's breakeven point is affected by each of the following:
a) The firm finds is can raise price due to a decrease in foreign competition.
b) The firm's direct labor costs are reduced as a result of a new labor contract.
c) The Occupational Safety and Health Administration (OSHA) requires that the firm to install new ventilating equipment in its plant. (Assume this does not affect worker productivity.)