Just do a simple calculation and be careful during that:
= 2 1/2 + 2(3/8) + 1 1/4 pounds
= 5/2 + 3/4 + 5/4 pounds
= 10+3+5 /4
= 18/4
= 9/2
In short, Your Answer would be 4.5 pounds or 9/2 pounds or 4 1/2 pounds
[They all are answers in different forms]
Hope this helps!