Yellowknife Mining provides the following information about their diamond mine.

Capitalized cost $$12,000,000$; no residual value

Expected output $16,000,000$ units

Production for the year $750,000$ units

Sales for the year $650,000$ units

No beginning inventory

Prior to recording depletion expense for the year, a discovery was made that production was actually $800,000$ units for the year. Sales amounts did not change. The effect this would have on the current year$$s depletion calculation would be

Select answer from the options below

the depletion rate per unit would increase.

the depletion rate per unit would decrease.

the amount of depletion expense left in inventory would not change.

the depletion rate per unit would not change.