6:03 La guestio Safad Department Stores is applying marginal-cost benefit analysis to decide whether to replace a computer system. The benefits of the new computer system are $20,000 and the cost of this computer system is $15,000, while the benefits and costs from the old computer system are $5,000 and $12,000 respectively the salvage value of the old computer is $3,000 Marginal Costs $3,000 What do you recommend Choose Marginal Benefits $15.000