Solution:
S1 $180,000 is allocated 70% to S2 or $126,000 ( 0.7 * 180,000 )
S2 total is $162,000 + $126,000 = $288,000
S2 $126,000 is allocated 19.7% to P2 or $81000
Under the step-method of cost allocation,
the amount of costs allocated from $2 to P2 would be $81000