Splish Splash Art is a centre that offers children's music and dance lessons. Splish Splash prepares annual financial statements and has a December $31,2023,$ year$-$end.

a$.$ On September $1,$ Splish Spash Art collectis $$15,300$ cash for dance lessons running from, September $1,2023$ to December $31,2023.$

b$.$ On October $1,$ Splish Splash Art collects $$8,400$ cash in advance from the Music Box Inc. $($ $$4,200$ per month$)$ to rent its performance stage for the full month of December $2023$ and January $2024.$

c$.$ On October $1,2023,$ Splish Splash Art collects $$13,100$ cash for four months of music lessons for a local private school. The lessons run from October $1,2023$ to January $31,2024.$

Required:

For the above transactions, record the initial journal entry and the adjusting entry required on December $31,2023.$