Required: Prepare the adjusting entries needed at the December 31, 2021 year-end related to the following transactions for Greg's Mobile Pet Grooming. Assume adjusting entries are only made once a year at the year-end date. Show calculations for full marks. (Explanations on journal entries not required) (15 marks) a) A new van for the mobile grooming was purchased on October 1, 2021 at a cost of $52,000. The van is expected to be useful to the business for 10 years at which time it is expected it can be sold to someone for other uses for $2,000. b) Greg's performed a grooming service for a large poodle on December 30, 2021 to prepare it for a New Year's Eve dog show. Greg's charges $80 per hour and the grooming took 3 hours. This has not yet been billed to the customer at the year-end. c) At January 1, 2021 the company had supplies of $2,400 and purchased an additional $3,600 during the year. A count of supplies was done at December 31, 2021 and it was found that $1,800 remained. d) One of Greg's customers gets it's dog groomed on the 15 day of each month. This customer paid $1,200 on July 1, 2021 for 10 grooming appointments starting July 15. e) The business paid $9,000 for a full year of insurance coverage on August 25, 2021. The insurance covers the period of September 1, 2021 - August 31, 2022