Math Word Problem: Saving for a Toy Figurine - Ratio and Percentage

Let's call the amount of money Lucas saved on Monday "x". According to the ratio, the amount he saved for the rest of the days (Tuesday to Sunday) is 5x. After saving $8.20 on Tuesday, he was 70% away from his targeted amount. This means he had saved 30% of his targeted amount. Since he saved $8.20 on Tuesday, 30% of his targeted amount is $8.20. So, 0.3 * targeted amount = $8.20. Therefore, the targeted amount is $8.20 / 0.3 = $<<8.20/0.3=27.333333333333332>>27.33. Answer: \boxed{27.33}.