The data frame should contain median prices added by the joinpricecvfbounds function.
Estimate missing quantity For each trade flow in the given data frame, compute quantity_cf from the weight using a conversion factor and comput quantity_up from the trade value using a unit price. These columns will be available in the data frame output of this function, but they will not be saved in the validated database.
Split the data frame between flows which have a quantity from those which don't complete missing quantity from weight when available or from the tradevalue when the weight is not available Check upper and lower bounds on price against a table of reference unit prices In general NA values should be avoided for the upper and lower bounds on prices
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