In 2020, Sheifield Construction Corp. began construction work under a 3-vear contract. The contraci price wax 4 mo, oon shef-eta uses the percentage-of-completion method for financial accounting purposes. The income to be recogriced eich peir in baved in if proportion of cost incurred to total estimated costs for completing the contract. The finandid stat-ment grementaichi riatirs in this contract at December 31, 2020, are shown below Income (before tax) on the contract recognized in 2020$23,001 (a) How much cash was collected in 2020 on this contract? Portion of contract billings collected (b) What was the initial estimated total income belore tax on this contrat?? Income before tax on this contract