If Sally sold 30% more lemonade this week, she sold 20 * 30/100 = <<20*30/100=6>>6 more cups this week.
This week, Sally sold 20 + 6 = <<20+6=26>>26 cups of lemonade.
In total for both weeks, Sally sold 20 + 26 = <<20+26=46>>46 cups of lemonade.
#### 46