the data is ancillary offerings from different airlines. taken from various routes, dates, flight types. The ancillary offerings are categorised and sub_categorised. They may differ pending on airline, routes (regions), quantity, unit_price, pricing_condition, dimensions, dimensions_units, weight, weight_units. Can you analyze the data for variances between the airlines per category and sub_category? are all airlines offering same ancillary offerings? or are they different?