If you may please show me the calculations with it

Ritt Ranch & Farm sells three grain/hey dryer to a local farmer at a total contract price of $45, 200. Each dryer has a standalone selling price of $14,000 and a cost of $11,000. In addition to the dryers, Ritt provides installation, which has a standalone selling price of $1,000 per unit installed. The contact payment also includes a $1, 200 maintenance plan for the dryer for 3 years after installation. Ritt signs the contact on June 20, 2016, and receives a 20% down payment from the farmer. The dryers are delivered and installed on Oct. 1, 2016, and fully payment is made to Ritt. Prepare the journal entries for Ritt in 2016 related this arrangement