M. Dodge has a sole proprietorship business, 2021 is the first year of operations. The following information relates to the operations: In 2021 fiscal period, the business has cash sales of $80,000. It also has sales on account of $30,000, of which $15,000 remains outstanding at the end of the 2021 fiscal period. - Of those on account, it is estimated that $5,000 will be doubtful of collection. - Of the cash received, $10,000 represents advances is for merchandise that will only be delivered in the 2022 fiscal period. What is the business income for the 2021 fiscal period