A $3$phase, Y connected alternator with equal line voltages of $500$V and grounded neitral supplies energy to an unbalanced Y conencted load, the neutral of which is not grounded. The line currents are I$-1=141.$A$,$ I$-2=100$A and I$-3=100$A$.$ One wattmeter is used and it is connected with its current coil in line $1$ and its potential coil across lines $1$ and $2.$ If this wattmeter indicated $70\mathrm{.}7$KW$,$ what is the total power supplied to the load. Phase sequence is said to be $12-23-31.$