Answer and Explanation:
The Journal entries are as follows:
On 2020,
Wages expense Dr. $18,720 (13 × 8 hrs × 10 days × $18)
To vacation wages payable $18,720
(being the wages expense is recorded)
On 2021
Wages expense Dr $1,638
Vacation wages payable $16,848 (13 × 8 hrs × 9 days × $18)
To Cash $18,486 (13 × 8 hrs × 9 days × $19.75)
(being cash paid is recorded)
Wages expense Dr. $20,540 (13 × 8 hrs × 10 days × $19.75)
To vacation wages payable $20,540
(being the wages expense is recorded)