Engineering Economics
What refers to the ratio of the interest payment to the principal for a given unit of time and usually expressed as a percentage of the principal?

Rate of return
Return of investment
Yield
Interest rate

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Engineering Economics
The monthly demand for ice cans being manufactured by Mr. Camus is 3200 pieces. With a manual operated guillotine, the unit cutting cost is P25.00. An electrically operated hydraulic guillotine was offered to Mr. Camus at a price of P275,000.00 and which cuts by 30% the unit cutting cost. Disregarding the cost of money, how many months will Mr. Camus be able to recover the cost of the machine if he decides to buy now?

11 months
12 months
13 months
10 months

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