Final answer:
The rate per 100 kg is found by dividing the total charge by the total weight to get the rate per kg and then multiplying that rate by 100. The rate per 100 kg on the shipment is $7.00.
Step-by-step explanation:
To find the rate per 100 kg, we can first calculate the cost per kilogram by dividing the total cost by the total weight. In this case, the total cost is $84.00 and the total weight is 1200 kg, so the cost per kilogram is $84.00 / 1200 kg = $0.07 per kg.
Next, we can calculate the cost per 100 kg by multiplying the cost per kilogram by 100. So the rate per 100 kg is $0.07 per kg * 100 kg = $7.00 per 100 kg.