Joerenz is saving money from his on-job-training allowance to buy an iphone. In the first week he saved Php 30.00, and each following week he saved twice as much as the week before. Joerenz saved enough money to buy the iphone after 10 weeks. How much did the iphone cost?
A. Php 30,690.00 B. Php 35,690.00 C. Php 36,690.00 D. Php 40,490.00