Estimate the discount percentage for using cash intend of credit (cash pay 3.49 and 3.59)

To estimate the discount percentage for using cash instead of credit, we need to calculate the difference between the cash price and the credit price, and then divide that by the credit price.

Cash price: $3.49
Credit price: $3.59

Difference: $3.59 - $3.49 = $0.10

Discount percentage: ($0.10 / $3.59) * 100 = 2.79%

Therefore, the estimated discount percentage for using cash instead of credit is approximately 2.79%.