Pastaroni is a local Italian restaurant that serves a specialized pasta salad. Included in this salad are macaroni, linguine and bow tie pasta. The salad contains six times as much linguine as it does macaroni. Both macaroni and linguine sell for $4; bow-tie pasta sells for $8. If the restaurant makes 140 pounds of pasta every day, how many pounds of each type of pasta are needed if the salad sells for $6?