FinalGrade
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At the end of every term, Prof ? has to compute the final
grades for the students in his CSE 1020 course.  One of
the steps involves combining the scores for each part of
the course into a score for the whole course.

In the course, the students have to do seven tests, each 
worth 10%.  Each test is scored on a scale 0-10.  Furtermore, 
the students have to write a final exam, worth 30%.  The final 
exam is scored on a scale 0-50.  During the term, student 
can obtain bonus marks.

Input
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The input starts with an integer C, with 1 <= C <= 30, the number 
of test cases.  Each test case consists of a single line.  The
line consists of eight or nine integers: the scores of the
seven tests, followed by the score of the final exam.  The
ninth integer is not always present and captures the bonus
marks obtained by the student.

Output
------
For each test case, print a single line consisting of the
score for the whole course, providing two digits of precision.

Sample input
------------
3
8 8 9 8 7 8 7 40
7 6 8 6 5 7 8 36
10 9 10 8 10 8 9 45 2

Sample output
-------------
79.00
68.60
93.00