How does your lowest price gurantee work?

How do we calculate the price to match:

Listed price + Shipping price

Senario #1: Product A is listed as $100 on website X and has a shipping fee of $20 that takes less than 10 days, we will match the price at $120.

Senario #2: Product A is listed as $100 on website X and has options for free shipping that takes more than 10 days and $20 for shipping that takes less than 10 days, we will match the price at $120

We will not use shipping fees that takes more than 10 days to price match. We will use their priority or express shipping price instead.

Senario #3: Product A is listed as $100 on website X and has free shipping that takes less than 10 days. We will match the price at $100.

Senario #4: Product A is listed as $100 on website X and all their shipping options takes 10 days or more. We will not match their price.