The set X consists of the following terms: {4,44,444,4444,.....}, where the nth term has n 4's in it for example 10th term is 4444444444. What is the hundreds digit of the sum of the first 75 terms of set X?  Pick:
A) 0  B) 2  C) 4  D) 6  E) 8
75*4 + 74*40 + 73*400 = 300 + 2960 + 29200= 
<gadget id="calculator">300 + 2960 + 29200</gadget>
<output>32_460</output>
32460   The hundreds digit is 4.   The answer is 4.
<result>C</result>
The set X consists of the following terms: {4,44,444,4444,.....}, where the nth term has n 4's in it for example 10th term is 4444444444. What is the hundreds digit of the sum of the first 75 terms of set X?