Answer:
$150 credit and to find debt first you would enter all these values into your calculator by filling in original balance in replace of 0000.00 x 0.00 interest
000.000 x 0.00 interest
and enter percent in replacement to the last zero if 0-9
and 2nd from last zero if 10 - 99 %
ie) 4% is 0.04 for 4% debt
for credit 4$ is 1.04