Question: . Jangson Group purchase items from a vendor at a cost of $20 each, and the forecast for next years demand is 1000 units. If
. Jangson Group purchase items from a vendor at a cost of $20 each, and the forecast for next years
demand is 1000 units. If it costs $5 every time an order is placed for more units and the storage cost is $4
per unit per year. Compute the following:
Mean Error (ME):
Mean Absolute Deviation (MAD):
Mean Square Error (MSE):
Mean Absolute Percentage Error (MAPE):
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