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Upon checking your form, I see that you're adding the result from another form calculation widgets to your total calculation.
However, you're inserting a text value "$5.00" using conditions on some of the form calculation widgets.
Please note that the calculation tool can only work with numeric values.
Please try to remove the $ sign on these conditions.
The screenshots above are from Running and Walking section, but the same goes for the Snooker section.
Let us know if this helps.