Mundo Company is a calendar year, accrual basis taxpayer. In June 2021, Mundo received a $72,000 cash payment from a tenant who leases space in a commercial office building that Mundo owns. The payment was rent for the 24-month period beginning on July 1, 2021. As a result of the payment, Mundo should report: No book income and $72,000 taxable income $18,000 for both book income and taxable income $72,000 for both book income and taxable income $18,000 book income and $72,000 taxable income