Question 207128
Simply add up like terms:


<pre>
      4 lb 15 oz
    + 3 lb 13 oz
 ----------------
      7 lb 28 oz
</pre>


Since 16 oz = 1 lb, this means that 28 oz = 1 lb 12 oz (since 28=16+12). So 7 lb 28 oz breaks down to 


7 lb 28 oz = 7 lb + (1 lb 12 oz) = 8 lb 12 oz



So the final answer is 8 pounds 12 ounces.