These are the correct answers. Please explain how to derive the answers given the following information. Thank you!!

Given the following, answer questions 20-23. DSO*: 35 DIH*: 23 DPO*: 45 2019 Revenue: $5,700 2019 COGS: $2,500 Days in a year: 365 2018 Accounts Receivable: $527 2018 Inventory: $144 2018 Accounts Payable: $284 . . *2018 & 2019 numbers 20. Calculate accounts receivable in the 2019. A. $240 B. $263 C. $539 D. $547 E. $563 21. Calculate inventory in 2019. A. $151 B. $158 C. $359 D. $378 E. $530 22. Calculate accounts payable in 2019. A. $703 B. $682 C. $321 D. $308 E. $299