Total field calculation

i trying create script adds total field  both correct , incorrect responses based on color of text. instance incorrect reponse turns red   the correct response black.  i have running total of both response.

example    

 

header 1	header 2	header 3	header 4
q 1        a	q 2    c	q 3    a	q 4      a
q 5      b	q 6     a	q 7      d	q 8      d
q 9      c	q 10  b	q 11    c	q 12   d
q 13    a	q 14   d	# wrong   3	# correct  11

you'll need use custom script go on of fields, checking textcolor property , based on color decide whether or not use them in calculation.

if provide field names code.

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