What is the area of this parallelogram? HELPP PLSS

12 is 33 1/3% of 36 what is the whole

How do i work this problem out using the equation a=pe^rt

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done