On June $18$th$,2020,$ the Ronald Corp, which maintains a perpetual inventory system, sold merchandise inventory on account for $30,000$ to Holly Corp, which also maintains a perpetual inventory system. This inventory had cost Ronald $18,400.$ This sale was subject to a cash discount of $3/10$ net $100.$

On June $22,2020,$ Holly returned to Ronald $2,000$ of inventory that had been purchased on June $18$th$.$

On June $27$th$,2020,$ Holy paid Ronald within the discount period.

Make the necessary entries for Ronald Corp on:

June $18$th$,2020$

June $22,2020$

June $27,2020$

Then make those entries for Holly Corp