You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[EX Q]: Question: If the charge of staying in a student youth hostel $18.00/day for the first week, and $15.00/day for each additional week, How much does it cost to stay for 23 days?

 Option A: $336

 Option B: $289

 Option C: $282

 Option D: $274

 Option E: $286
[EX A]: Option A

[EX Q]: Question: A man has $480 in the denominations of one-Dollar, five-Dollar notes and ten-Dollar. The number of Dollars of each denomination is equal. What is the total number of Dollar that he has ?

 Option A: 50

 Option B: 60

 Option C: 90

 Option D: 48

 Option E: 67
[EX A]: Option C

[EX Q]: Question: A company plans to assign identification numbers to its employees. Each number is to consist of four different digits from 0 to 9, inclusive, except that the first digit cannot be 0. How many different identification numbers are possible?

 Option A: 3,024

 Option B: 4,536

 Option C: 5,040

 Option D: 9,000

 Option E: 10,000
[EX A]:
Option B