Node Voltage Analysis with dependent voltage and current sources
I got P=1084.5 Watt. These are the equations:

1) At supernode, (V1-60)/10 + V1/100 + (V3-V2)/20 + V3/400 - 0.625Va = 0 where Va = V2 - 60

2) For supernode, V3-V1 = 175 Iq where Iq = -V2/200

3) At node V2, (V2-60)/5 + V2/200 + (V2-V3)/20 = 0

Note: Iq flows in opposite direction of voltage drop, so the (-) sign. Also it should be V1/100 (not V1-60/100) at supernode equation.

Solving these, V1 = -60.75, V2 = 30, V3 = -87

Total Current by 60V supply: (60-V2)/5 + (60-V1)10 = 18.075

Power = 60 * 18.075 = 1084.5 Watt