Statements outside of the Loop

The PRINT statement should be the fourth statement of the sequential statements in front of the DO:

' Retail price calculator
' with markup entered by the user
PRINT "Enter the amount of markup in percent"
INPUT MARKUP
LET RATE = 1 + MARKUP / 100
PRINT "The price multiplier is:", RATE
DO     
  PRINT "Enter wholesale price"            ' ask the user for the wholesale price 
  INPUT WHOLESALE                          ' get the price, put it in a variable
  PRINT "Retail price:", WHOLESALE * RATE  ' compute and print out the retail price
LOOP
END

When the program starts up, the first four statements will be done in sequence:

Enter the amount of markup in percent
? 10
The price multiplier is:    1.1

After that, the program runs as before.