John mixed cashews and almonds. John brought 4 pounds of almonds for a total cost of $22. The cost per pound for cashews is 60% more than the cost per pound for almonds. John brought enough cashews that, when he mixed them with the almonds, the mixture had a value of $6.50 per pound. Approximately, what percent of the mixture, by weight, was cashews? A. 20% B. 25% C. 30% D. 35%