There are 27 different three-digit integers that can be formed using only the digits 1, 3, and 4. If all 27 of the integers were listed, what would their sum be?
Choose the correct choice from the following options:  A) 7592  B) 7692  C) 7792  D) 7892  E) 7992
There must be nine 1's in the hundreds place, nine 1's in the tens place, and nine 1's in the units place. This is also true for the 3's and 4's. Then the sum is:   9(111+333+444)=9*(888)= 
<gadget id="calculator">9*(888)</gadget>
<output>7_992</output>
7992.   The answer is 7992.
<result>E</result>
There are 27 different three-digit integers that can be formed using only the digits 1, 3, and 4. If all 27 of the integers were listed, what would their sum be?