Opportunity costs. A builder who specialises in carpentry is thinking about the time that he could spend: Working as a carpenter for which he is paid $30/hr Working as a painter for which he is paid $20/hr, Playing computer games which he values at $10/hr Gardening at his own home which he values at $5/hr. All of these activities are mutually exclusive so he can only do one activity at a time. What is his opportunity cost of working as a carpenter? Select one: O a. 365/hr. O b. $50/hr o c. $30/hr. d. $20/hr e $10/hr. A firm's managers should try to boost: Select one 3. Profits b. Revenues O e Share prices d. Shareholder wealth e. Debt holder wealth