HELSINKI (Reuters) -UPM’s chief executive on Tuesday defended a wage dispute that resulted in a four-month strike costing the Finnish forestry group up to 220 million euros ($235 million), saying it would ultimately benefit from standing its ground. “We will make that back many times in the coming years and decades,” he said, adding price increases resulting from a lack of supply during the period of industrial action could help UPM to manage its costs in future quarters. UPM’s Finnish pulp and paper plants were out of production for the first three months of 2022 due to a strike by the paperw…