If you would like to read about the exact procedure J. Huang and I used to calculate these numbers, visit the Statistical Methodology page.These are certainly a lot of numbers to consider and as I mentioned above, each model presents a different proportion.
You should understand that each model has its strengths and weaknesses and as you can see, each produces some very different numbers.
If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware.
If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.
The first does a relatively quick lookup to see if there are any eligible promotions for this ASIN or for this customer.
If there are, we'll make the subsequent call to see what promotions will be applied if the customer makes a purchase.