CALCULUS A doohickey producer wants to find the minimum cost necessary to manufacture doohickeys. The manufacturer expects to make 5600 doohickeys at a steady rate during the next year. Production runs of the same number of doohickeys will be evenly spaced throughout the year. The cost for each production run is $175. Carrying costs, based on the average number of doohickeys in stock, amount to $1 per doohickey. Let x be the number of doohickeys made per production run and r be the number of production runs during the year. Determine the number of production runs per year and the number o

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