Q$2.$ A machine tool is used for sequential batch processing of parts. For one specific batch, the following details are provided: $$ Starting material cost $=$ $$10\mathrm{.}00$ per piece $$ Batch quantity $=100$ parts $$ Actual machining time per piece $=6\mathrm{.}00$ minutes $$ Load and unload time per piece $=2\mathrm{.}5$ minutes $$ Cost of the cutting tool $=$ $$5\mathrm{.}00,$ and each tool must be changed after $20$ pieces $$ Tool change time $=2\mathrm{.}0$ minutes $$ Setup time for the batch $=2$ hours $$ Hourly wage rate of the operator $=$ $$18\mathrm{.}00$ per hour $$ Labor overhead rate $=40\%$ Hourly equipment cost rate $=$ $$36\mathrm{.}00$ per hour The machine operates with $100\%$ availability and $0\%$ scrap rate.