A point is an abstraction to point a location or vertex (intersection of lines). It has no size. Consequently it does not have shape or color or any physical characteristic.
Then the answer is all of the above.
Sam gets (500/10)*3=150<span>£
harry gets (150/100)*35= 52.5</span>£
Let's Just See How Many Times 30 Goes Into 180

Since 8 trash bags last 30 days, let's multiply

ANSWER
You'll Need 48 Trash Bags For 180 Days