On August 11, 2019, Ellsbury Inc. entered into a contract to deliver one of its specialty machines to Duda Landscaping Co. The contract requires Duda to pay the contract price of $10,000 in advance on August 21, 2019. Duda pays Ellsbury on August 21, 2019, and Ellsbury delivers the machine (with cost of $6.000) on September 1, 2019. Instructions (a) Prepare the journal entry on Aug. 11, 2019, for Ellsbury. (b) Prepare the joumal entry on Aug. 21, 2019, for Ellsbury. (c) Prepare the journal entry on Sep. 1. 2019, for Ellsbury