If you are a Self Serve yogurt location, you may sometimes offer a flat fee instead of by weight. This is a common thing people do now. Happy hours, certain days, slow periods.
If you want to keep track of the weight as well, you can do this and provide a flat fee.
To begin:
Office - Menu Center - Menu Layout.
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You will then have to assign the Happy Hour to the to the Price1 Column for the dates and times you are using this discount. During the off hours the item will not be usable to your staff since the price will be so high.
The results of this work are shown on the following order. The first Item sold is shown before the happy hour kicks in. The second one is with the applied happy hour.