A copper-zinc processing plant utilizes a conventional flotation circuit as a primary concentrator to recover copper. A secondary flotation circuit is used to recover the zinc from the copper circuit tailings stream. Assays around the primary circuit provided the following assay values:

a. Identify the data set (copper or zinc assays) that provides the best assessment of mass yield. Provide an explanation for your answer; b. Calculate mass solids yield to the copper concentrate; c. Calculate copper recovery; d. If the plant treats 1000 tons/hr of feed and operates 6000 hours annually, determine the value of the concentrate at the current market value for copper (provide the source of your reference).

Product Cu=27.41%Zn=5.33%