Answer :
I will not give you the answer but I will show you how to solve this.
55*.6= A
65*.6=B
75*.6=C
85*.6 = D
Do you see the trend? Continue until ten equations are formed and add all of the totals. A+B+D+C...=Total
55*.6= A
65*.6=B
75*.6=C
85*.6 = D
Do you see the trend? Continue until ten equations are formed and add all of the totals. A+B+D+C...=Total