Uncle Sammy has invested a total of $2,300.
The minimum interest rate he earns is 7%.
Let us compute the least amount Uncle Sammy could earn from his $2,300 investment at 7%.
Calculating 7% of 2,300 yields 0.07 * 2,300 = $161.
Uncle Sammy's maximum interest rate is 13%.
Now, let’s determine the highest amount Uncle Sammy can earn from investing $2,300 at 13%.
Calculating 13% of 2,300 yields 0.13 * 2,300 = $299.
In conclusion, the earnings range for Uncle Sammy from his next paycheck investment of $2,300 is between $161 and $299.