Simple script to calculate UCAS points

UCAS_Calc.irb

puts 'How many units did you achive?'
total_units = gets.to_i
# validations for the input format
if total_units == 0
  puts 'Please enter a number that is greater than 0.'
end

#Counters
total_points = 0
submited_counter = 0
asking_counter = 1

while total_units > submited_counter do
  puts "What did you achive in the #{asking_counter} unit?"
  grage_input = gets.capitalize.chomp

#Validates the user's second input
until grage_input == "Pass" || "Merit" || "Distenction" do
  puts "You can only enter Pass Merit or Distenction here."
  grage_input = gets.capitalize.chomp
end

    if    grage_input == 'Pass'
      total_points += 70
      submited_counter += 1
      asking_counter += 1

    elsif grage_input == 'Merit'
      total_points += 80
      submited_counter += 1
      asking_counter += 1

    elsif grage_input == 'Distenction'
      total_points += 90
      submited_counter += 1
      asking_counter += 1

    else
      puts 'Please enter Pass, Merit or Distenction and then pess enter.'
    end
  end

# Total achived points
puts "You have achived #{total_points} poins."