1. I have to set up the structure of a one-variable data table on the Analysis worksheet that shows the car charge, mileage charge, gas expense, and total transportation expense given changes in the average price of gas from $2.20 to $3.80 by increments of $0.20.

Here I would like to know which was the formula to obtain P3?

6. A few rows below the one-variable data table, create the structure for a two-variable data table that shows the total projected transportation expense given the interaction between average gas prices from $2.20 to $3.80 by increments of $0.20 and miles per gallon from 18 to 28 by increments of 2 miles per gallon.

Here I would like to know which would be the formula to obtain L24?