To mail a package, the rate is u cents for the first pound and v cents for each additional pound, where u>v. Two packages weighing 3 pounds and 5 pounds, respectively can be mailed seperately or combined as one package. Which method is cheaper and how much money is saved?  Choose the correct choice from the following options:
A) Combined, with a saving of u-v cents
B) Combined, with a saving of y-x cents
C) Combined, with a saving of x cents
D) Separately, with a saving of x-y cents
E) Separately, with a saving of y cents
This means it costs x cent for the first pound in weight for example, 20 cents for the first pound.   It costs y cents for the every pound in weight above this, for example 10 cents for pound 2 and 10 cents for pound 3.   x is more than y. for example 20 cents vs. 10 cents   3 pounds: x+2y   5 pounds:x+4y   Total: 2x+6y   8 pounds: x+7y   So we are saving:   (2X+6y) - x+7y   = x-y cents   Combined is cheaper as we maximise y and minimize x.   Combined, with a saving of u-v centsnswer is:   1) Combined, with a saving of x-y cents
<result>A</result>
To mail a package, the rate is u cents for the first pound and v cents for each additional pound, where u>v. Two packages weighing 3 pounds and 5 pounds, respectively can be mailed seperately or combined as one package. Which method is cheaper and how much money is saved?