Heating oil prices can fluctuate widely over time and by location. 1  From January 2005 to March 2010, the average price nationwide was $1.95-$2.95 a gallon; from January to March 2012 the average weekly price was $3.85-$4.12. 2  A building/mechanical permit is usually required to replace a furnace.
Quick Answer. A MasterCard has a total of 16 digits. MasterCard, as well as most major credit card systems, use the ANSI Standard X4.13-1983 system, in which each digit identifies a particular attribute of the card. . Keep Learning.
With Visa, MasterCard, and Discover, the credit card numbers are 16 digits long, and the 7th digit to the 15th digit is the account number. This leaves nine digits for your account number â providing billions of possible combinations. With American Express, there are only 15 digits to the account number.