Analyze the following statements:

a. Since Rachel spent the same amount in both years, she was no better off. pizzawise, in 1999 than in 2000.

b. Since she now buys 50 pizzas at $2 less than in the previous year, she is $100 better off in 2000 than in 1999.

c. Rachel would pay about $90 to be able to purchase pizzas at $8 rather than $10.