Solving a Word Problem: Lucas' Toy Figurine Savings

Let's assume the amount of money Lucas saved on Monday is x.\nAccording to the given ratio, the amount saved for the rest of the days (Tuesday to Sunday) is 5x.\nAfter saving $8.20 on Tuesday, Lucas was 70% away from his targeted amount. This means he saved 100% - 70% = 30% of his target.\nLet's say Lucas' target amount is T.\nSo, 0.3T = $8.20\nTherefore, T = $8.20 / 0.3 = $27.33\nThe total amount saved for the rest of the days is 5x, which is equal to $27.33 - $8.20 = $19.13\nSince the rest of the days are Tuesday to Sunday, the total number of days is 6.\nTherefore, the amount saved every day for the rest of the week is $19.13 / 6 = $3.19. Answer: \boxed{3.19}.