Greenville Industries uses the accrual basis to account for all sales transactions. Sales for 2018 total $540,000. Included in this amount is $15,000 in receivables from sales on installment. Installment sales are considered revenue for book purposes, but not for tax purposes. Operating expenses total $140,000 and are treated the same for book and tax purposes. What is Greenville's taxable income?

Group of answer choices

$525,000

$400,000

$540,000

$385,000