1370 , X, 1070 , -180, -6430 Select.
A) 1320	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   1320NSWER:1320.
<result>A</result>
1370 , X, 1070 , -180, -6430