If chargaff's equivalence rule is valid, then hypothetically we could extrapolate this to the combined genomes of all species on earth (as if there were one huge earth genome). in other words, the total amount of a in every genome on earth should equal the total amount of t in every genome on earth. likewise, the total amount of g in every genome on earth should equal the total amount of c in every genome on earth.
calculate the average percentage for each base in your completed table. do chargaff's equivalence rules still hold true when you consider those six species together