Exotics faucets and sinks ltd., guarantees that its new infrared sensor faucet will save any household that has 2 or more children at least $30 per month in water costs beginning 1 month after the faucet is installed. if the faucet is under full warranty for 5 years, the minimum amount a family of four could afford to spend now on such a faucet at an interest rate of 1/2% per year, compounded monthly, is closest to(a) $149c) $1787(b) $1552d) $1890