Probably not too many Northern mathematics texts had questions about bales of cotton (p. 140):
Example 1. — A factor sells 25 bales of cotton at $100 per bale : what is his commission at 2½ per cent. ?
Similarly, a Northern text would probably not have an example of an order from Jefferson Davis (p. 209), or helpful explanations such as "In some States there is no capitation tax, and the sum to be raised for the expenses of the Government is collected from each individual, in proportion to his property. In South Carolina, this is on land and negroes, and is called the general tax." (p. 142)
You can also find questions such as (p. 13)
(19.) From the creation of the world to the flood was 1656 years ; from that time to the building of Solomon's Temple, 1336 years; thence to the birth of our Saviour, 1003 years : in what year of the world was our Lord born ?
I suppose it's not as bad as it could be. There are no questions like "Nathan Bedford whipped 3 slaves every day of the week except the Lord's day. How many slaves did he whip in total?"