ABERDEEN may be Scotland’s third club at the moment but their financial figures for 2018-19 highlight the chasm between the Dons and the Old Firm, Celtic and Rangers. Derek McInnes’ team plays host to Rangers this week with nine points separating the Gers from Aberdeen. This is only one aspect of the difference between the two clubs – Aberdeen’s turnover may be close to £ 16 million, but Celtic and Rangers generated revenues of £ 83 million and £ 53 million respectively in 2018-19. Furthermore, Aberdeen’s wage bill of £ 9.2 million is dwarfed by Celtic’s £ 56 million and Rangers’ £ 34 million. Aberdeen finished fourth in the Scottish Premiership in 2018-19, their lowest position since 2013. Since Derek McInnes took over in…