Current Attempt in Progress

Emilio and Ren$$ Santos own Club Metlock. From its inception, Club Metlock has sold merchandise on either a cash or credit basis, but no credit cards have been accepted. During the past several months, the Santos have begun to question their credit$-$sales policies. First, they have lost some sales because of their refusal to accept credit cards. Second, representatives of two metropolitan banks have convinced them to accept their national credit cards. One bank, Business National Bank, has stated that $(1)$ its credit card fee is $5\%$ and $(2)$ it pays the retailer $96$ cents on each $$1$ of sales within $3$ days of receiving the credit card billings.

The Santos decide that they should determine the cost of carrying their own credit sales. From the accounting records of the past $3$ years, they accumulate these data:

$\backslash$table$[[,2022,2021,2020],[$Net credit sales,$$400,000,$$$450,000,$$$300,000$