Then Party A and Party B save less 30 yuan C ..

Then 134-30= 104 yuan is the deposit of Party A and Party B minus the deposit of 30 yuan and Party C.

The available deposits of C are

104 divided by 2=52 yuan.

B and C are cheaper than A, 34 yuan.

You can also buy one to save money.

134-34= 100

100 divided by 2=50 yuan.

Then b saves money to buy it

134-50-52=32 yuan

A saves money in 50 yuan, B saves money in 32 yuan and C saves money in 52 yuan.