To infer the daily sales amount at a temperature of 68 degrees, let's analyze the provided data points:
- At 60 degrees, the sales are $24.
- At 68 degrees, the sales are $44.
- At another 68 degrees, the sales are $54 (this indicates there might be variability at the same temperature).
- At 94 degrees, the sales are $80.
Since there are two entries for 68 degrees ($44 and $54), we can take the average of these two values to provide a more consistent estimate:
\[ \text{Average sales at 68 degrees} = \frac{44 + 54}{2} = \frac{98}{2} = 49 \]
Rounding $49$ to the nearest whole number, the inferred daily sales amount at 68 degrees is approximately 49.