Compare the demand for sugarsugar with demand for gasolinegasoline. the demand for sugarsugar is likely

In this case, the demand for sugar is likely more Inelastic because it only took smaller fraction of consumers budget.

Since sugar is really cheap, an increase of sugar's price will not even be noticed by the customers (because it probably not even in dollar amount). Because of this, the demand for sugar will remain constant despite the changes in price.