Answer:
1. Accrued salaries expense as of December 31 would be calculated as follows:
Number of days from Saturday to Thursday = 5 days
Salary expense per day = P4,800 / 6 days = P800 per day
Accrued salaries expense = 5 days x P800 per day = P4,000
Therefore, the company would need to record an accrued salaries expense of P4,000 as of December 31.
2. Accrued water expense as of December 31 would be calculated as follows:
Number of days from December 26 to December 31 = 5 days
Water expense per day = P890 / 30 days = P29.67 per day
Accrued water expense = 5 days x P29.67 per day = P148.35
Therefore, the company would need to record an accrued water expense of P148.35 as of December 31.