GAUSS8 2003 Problem 10

Past Contests GAUSS8 GAUSS (GR. 8) - 2003
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1

A different digit is inserted into each of the two boxes to make the equation

15.2+1.52+0.15 \square \text { + } \square .128=20

The sum of the digits in the two boxes is

Answer Choices
A. 5
B. 6
C. 7
D. 8
E. 9