manageMerch.costPerUnitDisplay is only comprised of two variable values in a table that don't need translation: the string attached reads {{costUnit}} ({{costExtraUnit}}).
Perhaps, remove it from translatable strings ! (or not if it does require some translation maybe)
manageMerch.costPerUnitDisplayis only comprised of two variable values in a table that don't need translation: the string attached reads{{costUnit}} ({{costExtraUnit}}). Perhaps, remove it from translatable strings ! (or not if it does require some translation maybe)