Phil Just Started a New Habit of Eating Once a Week

Short Answer

Phil just started a new habit of eating once a week at Mr.Sub restaurants.On average, he spends about $10 per meal.Phil says, "I'm 20 years old and I plan on eating at Mr.Sub until I am 50 years old." Phil's lifetime value at Mr.Sub could be best estimated by which calculation?
$10 x 50
$10 x 20
$10 x 52 x 50
$10 x 52 x 30
$10 x 52 x 20