ເຄື່ອງຄິດໄລ່ຄ່າໃຊ້ຈ່າຍ / ຄ່າໃຊ້ຈ່າຍ Number of cigarettes in a pack = Price per pack($) = Number of cigarettes smoked per day = Monthly Cigarette Expense = $ Yearly Cigarette Expense = $