The price of a washing machine is 2/(2+3)=2/5 of the total money.

Then the total money for color TV and stereo: (1-2/5)=3/5.

Audio accounts for 1/4 of the total price of color TV and audio.

Audio accounts for (3/5)x( 1/4)= 3/20 of the total price.

There are more washing machines than stereos;

2/5-3/20= 1/20

It is known that stereos are cheaper than washing machines, 720 yuan,

Washing machine, color TV and stereo * * *:

720/( 1/20)= 14400 (yuan)