Two companies are located 30 miles apart and both supply each other with goods. Eight times a month they send their trucks to each other full of cargo and then they return empty. Each driver costs $175 per day with benefits (the round trip takes all day) and each firm has truck operating costs of $1.30 a mile

1. How much would each company save monthly if they sent their trucks just twice a week and hauled the others cargo on the return?
2. How much would each company save monthly (in total) if there was a $0.30 per mile emission tax on all business truck travel?