Receivables and cash were understated by $200. A trader sold goods on credit worth $500 on December 31, 2020. The goods were delivered to the customer that same day. The company accountant later found out that an office assistant had generated an invoice for $300 on December 31, 2020 and another for $200 the following day. What was the effect of these transactions in the books of the trader at year end? SELECT ONLY ONE Sales and receivables were understated by $200. Sales and cash were overstated by $300. Receivables and sales were overstated by $300