lee eng baked chocolate cookies and macadamia cookies in the ratio 3 : 2. She gave away 132 chocolate cookies and 92 macadamia cookies. After that, the ratio of chocolate cookies to macadamia cookies was 2 : 1.
(a) How many cookies did she have altogether in the end?
(b) The remaining cookies were sold in packets of 4 for $1 or $0.50 each. She earned $11 from the sales. How many cookies were sold at $0.50 each?