The function M(s) = 225 + 0.65s represents the material cost of manufacturing gardening scissors when s scissors are produced. The function L(s) = 54 + 1.15s represents the labor cost for producing s scissors. Which expression correctly represents the manufacturing cost per scissors?Answer choices are A. 171 - 0.50s B. 279 + 1.80s C. 279 + 1.80s/s D. 171-0.50s/s