Inventory Reserve for Unpaid Amounts

In November $2023,$ Lykke$$s Jewels Ltd$.$ sells a necklace for $$120,000.$ The cost of this

necklace was $$66,000,$ resulting in a gross proft of $$54,000.$ The $$120,000$ sales price is to be

paid in four equal annual instalments of $$30,000$ on December $31$ in each of the years $2024,$

$2025,2026,$ and $2027.$ Lykke$$s Jewels Ltd$.$ has a December $31$ taxation year end. Indicate the

maximum amount of the reserve that can be claimed and the net increase in business income

for each of the years $2023$ to $2027$ as a result of claiming the maximum available reserve.