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Continue to ChatA 13 to 1 benefit to cost ratio https://www.kiwiblog.co.nz/2013/05/a_13_to_1_benefit_to_cost_ratio.html
A 13 to 1 benefit to cost ratio https://www.kiwiblog.co.nz/2013/05/a_13_to_1_benefit_to_cost_ratio.html