It's up to 80% of the full salary. While your typical Swedish programmer would get more than $350/week, they're not going to get 80% of their salary since they cap out well before that.
Oh, you're right. I missed the part about the 680 SEK / day cap.
Is that per calendar day or workday? I guess calendar day. That means the average programmer would get about 50% of salary on unemployment. (Just taking a wild guess that a programmer in Sweden makes 40k SEK / month.)