Please show a b and c

On August 12, Espresso Inc. sells merchandise worth $20,000 (gross sales price) to Crescendo Inc., terms 4/10, n/30. Espresso grants cash discounts on amounts paid within the discount period. Espresso estimates unrecorded returns at the end of the reporting period. Required a. Prepare Espresso's journal entries (ignoring cost of goods sold) for the following transactions under the gross method. Aug. 12 Sales of $20,000 of merchandise to Crescendo. 17 Returns and allowances of $3,000 (gross) are granted Crescendo. 19 Espresso collects $11,520 cash from Crescendo on its account. 24 Returns and allowances of $2,400 (gross) are granted Crescendo on items not yet paid for. 27 Remainder of the Crescendo account is collected in full. Sep. 12 Returns and allowances of $1,000 cash (gross) are granted Crescendo on merchandise paid for on August 19. 14 Returns and allowances of $1,000 cash (gross) are granted Crescendo on merchandise paid for on August 27. b. Prepare Espresso's journal entries (ignoring cost of goods sold) for these transactions under the net method. c. Prepare a table showing the effect on Espres pg. 8-54 , sales returns and allowances, sales discounts, sales discount forfeitures, and the net effect on revenue under both the gross method and net method (ignoring cost of goods sold)