To determine which is better, we need to calculate the price per ounce of each option.
For the 12.5 oz bag of Doritos:
Price per ounce = $3.79 / 12.5 oz
Price per ounce = $0.3032 per ounce
For the 4 oz bag of Doritos:
Price per ounce = $1.00 / 4 oz
Price per ounce = $0.25 per ounce
Based on these calculations, the 4 oz bag of Doritos is a better deal as it has a lower price per ounce compared to the 12.5 oz bag.