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If the prime cost for Mido's company is $$12,000$ and the total manufacturing cost is $$30,000.$ Assuming that direct labour costs $$7,000,$ the conversion cost will be $q,$

a$.$ $$23,000$

b$.$ $$5,000$

c$.$ $$11,000$

d$.$ None of the mentioned options

e$.$ $$18,000$