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On 31 December 2019, when its Allowance for Doubtful Debt accounts had a credit balance of RM1,400, Shaza Company estimates that 9% of its accounts receivable balance of RM90,000 will become uncollectible and records the necessary adjustment to Allowance for Doubtful Debt accounts. On 11 May 2020, Shaza Company determined that Aina's account was uncollectible and wrote off RM1,200. On 12 June 2020, Jessica paid the amount previously written off. Required: Prepare the journal entries on 31 December 2019, 11 May 2020 and 12 June 2020