X, 1320 , 1070 , -180, -6430	Choose one:
A) 1370 B) 6530 C) 6630 D) 6730 E) 6830
1370-50*(5^0)=1320   1320-50*(5^1)=1070   1070-50*(5^2)=-180   -180-50*(5^3)=-6430   1370NSWER:1370.
<result>A</result>
X, 1320 , 1070 , -180, -6430