Can you help me with a Canada post rate?

Hi. I'm in Brazil. An eBay seller sent me two parcels from Canada and charged $99.90 dollars. They were both sent by Air Mail Small Packet. One weighted 1.950 kg and other 0.990 kg. I tried to figure out the rate at the Canada Post website but I don't have the boxes dimensions anymore (one was no larger than 40 x 40 x 30 cm and the other was about 30 x 30 x 20 cm) and, even guessing the numbers, they only show me express and surface mail rates (small packet does not appear). The post code from which the boxes were sent is L8T 3C7. May someone help me? Thank you very much.