How much do I charge for coasters through this tarifasco?

I'm just starting to knit and will make coasters that I must use to help me start things out to be self-employed. I live in Canada, so tariffs was added on to it. I want to sell high for myself, I thought it was going to be fairly $10, then $30 after seeing the yarn being roughly 9 dollars. I also feel I should go high to able to reperpose my life to get what I actually want. My brains chemistry try wasn't helping me before, but now it is there so much to catch up. I'll be doing more than coasters. I wanted to start learning from the bunny square plushy toturial alongside this, but I did not feel well on getting stuffing yet.