There are quite many reasons which make white wine less expensive than the reds. Grape varieties used for red wine are generally more expensive. Also varieties like Riesling and Pinot Gris grapes carry almost double the crop than reds.
The white wine makes its way to the Liquor store Fairfield faster when compared to the reds. White wine would spend a few months in stainless steel tanks or, barrels before being sent to the market, thereby offering better cash flow for the winery.
Red wines usually require new oak barrels for the toasty oak flavour and also need a longer ageing process thereby resulting in a higher manufacturing cost. Hence, the winery would tend to charge more for the red wine due to the manufacturing cost and higher profit margin, while keeping the prices of white wine down.