Charlie is putting money into a saving account. He starts with $550 in the savings account, and each week he adds $60. Let S represent the total amounted money in the saving account (in dollars), and let W represent the number of weeks Charlie has been adding money. Write an equation relation S to W. Then use this equation to find the total amount of money in the saving account after 12 weeks.

Equation :
Total amount of money after 12 weeks: $