Your trip falls into the 4001-6000 miles band, so if you had all partner airlines it would be 70k+5k, but you have an air canada flight which means there isn’t a flat rate. It could be as low as 70k+5k, but it could also be higher due to dynamic pricing.

It’s also possible that it’s pricing yyz-muc-spu, and spu-zrh separately as this isn’t a valid routing based on the underlying fare rules. If you can find a routing without an AC flight you won’t trigger this rule.