Bill оperаtes а prоprietоrship using the cаsh method of accounting, and this year he received the following: $100 in cash from a customer for services rendered this year a promise from a customer (account receivable) to pay $200 for services rendered this year tickets to a football game worth $250 as payment for services performed last year a check for $170 for services rendered this year that Bill forgot to cash How much income should Bill realize on Schedule C?