Solution:
Given,
Fisher plumbing supply Co. had sales of $2,780,000
Wrote off $16,000 of accounts as noncollectable
Net income of $120,000
Now,
Expense under direct write off: 16,000
Expense under Allowance: ($2,780,000*1%) = 27,800
which means expense is understated by = 27,800 - 16,000 = 11,800.
so, the net income under allowance would be 120,000 -11,800 = 108,200