Question 104
The PIN of Eugenia's phone consists of 4 digits; Eugenia only remembers that the first is between 0 and 6, the second between 0 and 3, the third between 0 and 4, the fourth between 0 and 2, and that the sum of the four digits is at least 8 (for example, the PIN could be 3330). How many codes are compatible with Eugenia's memories?