It changes the entire economics when your random example number keeps things well within the realm of profit whereas the actual tariffs eliminate the entire current profit margin for almost every product in the category we are talking about.

It still illustrates the point since the numbers are just fractions. You're just being pedantic.

You appear to appreciate the value of direct feedback. I hope you appreciate this direct feedback.

You could have made your point more effectively if you'd said something like "your math is correct, but it's important to keep in mind that the actual tariffs eliminate the entire current profit margin for almost every product in the category we are talking about."

Instead you began with a personal attack. It's hard for a discussion to recover from that.