[esafak]

Or one batch of bananas, weighing 0.4 pounds. The number of bananas is not specified in the receipt, and I would not expect the model to estimate it.

[AmbroseBierce]

The prompt literally tells it "if not specified assume 1"

[banandys]

it is very unlikely for 0.4 lbs of bananas to be more than one.

https://fdc.nal.usda.gov/food-details/1105314/measures

Sugar bananas or apple bananas would weigh less, but would cost more and probably not just be listed as bananas.

[esafak]

That would require the model to know or look up the average weight of a banana, and do arithmetic.