Hi Betty. I just checked Koodo Mobile add-ons and there is no option to make the calls to the US for $0.05 per minute. Currently, the only options for voice roaming are:
1. For $15, enjoy 40 minutes of talk while travelling within continental U.S., Hawaii and Alaska for 30 days.
2. For $35, get 400 incoming/outgoing texts, 40 U.S. minutes and 40MB U.S. data roaming rate when travelling within continental U.S., Hawaii and Alaska.