A Ham and Cheese Sandwich at the Local Deli Costs

A ham and cheese sandwich at the local deli costs $4.99 in 2005. If the CPI in 2005 was 90.0 and the CPI today is 121.0, the equivalent price for the ham and cheese sandwich today is

A) $4.99.
B) $6.04.
C) $5.54.
D) $5.29.
E) $6.71.