00:01
So here we're thinking about expenditure, or as the question points out, revenue.
00:05
So the revenue started off as is general, is price times quantity, right? that's what revenue is.
00:13
It's the number of units, so that's not my best handwriting, the number of units times how much people pay for them.
00:19
So i'm going to call the original revenue p0 and q0, right? that's where we started, right? this is our starting point.
00:28
Then these things are going to change, right? we have p1 is going to be different and q1 is going to be different.
00:38
These prices and quantities are changing, right? so instead of p zero, we have, it's doubling, right? p0 is going to 2p0 because the price of it is doubling, right? it's in 100 % increase...