1. A distribution center sends three dif erent types of parcels. One consignment has 6 small, 8 medium and 9 large parcels which cost $173.20 to post. Another consignment
has 7 small, 13 medium and 17 large parcels with total postage $291.05. A large parcel costs twice as much to post as a small one. Work out the total cost of posting 3 small parcels, 9  medium parcels and 2 large parcels.

2. A TV costs $900 including 20% sales tax. Find the new price if tax is reduced to 15%