Complete Program

Here is the complete program:

'Ask the user for the data.
PRINT "Enter the first odometer reading"
INPUT FIRSTMILES
'
PRINT "Enter the second odometer reading"
INPUT SECONDMILES
'
PRINT "Enter the first gallons"
INPUT GALLONS1
'
PRINT "Enter the third odometer reading"
INPUT THIRDMILES
'
PRINT "Enter the second gallons"
INPUT GALLONS2
'
'Calculate mpg for first tank of gas.
LET MPG1 = (SECONDMILES - FIRSTMILES) / GALLONS1

'Calculate mpg for second tank of gas.
LET MPG2 = (THIRDMILES - SECONDMILES) / GALLONS2

'Calculate the difference between mpg rates.
LET IMPROVEMENT = MPG2 - MPG1

'Write out the result.
PRINT "Your mileage improved by", IMPROVEMENT, " miles per gallon"

END