Please help Asap if possible. I’m stuck on this

African-American soldiers faced additional difficulties created by racial prejudice. Although many served in the infantry and artillery, discriminatory practices resulted in large numbers of African-American soldiers being assigned to perform non-combat, support duties as cooks, laborers, and teamsters. African-American soldiers were paid $10 per month, from which $3 was deducted for clothing. White soldiers were paid $13 per month, from which no clothing allowance was deducted. If captured by the Confederate Army, African-American soldiers confronted a much greater threat than did their white counterparts.

I’m pretty sure it’s 4, you can check on the calculator