formula for finding the price given the units consumed in x1 and x2 between two consumers

Consider an exchange economy with 2 consumers [A and B} and 2 goods in and x2}. Consumer A has 8 units of x1 and 5 units of lung, while Consumer B has 4 units of 3:1 and 10 units of 15:2. Consumer A's utility function is M=aa, and Consumer B's utility function is =g. Consider a competitive equilibrium allocation. Find the equilibrium price {piling}. [Answer just the number up to 2 decimal places}