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File:About-taxes fig2.png Depletion allowance calculation. Note that remaining reserves (U) are end of year. In cost depletion calculation, S = sales during year. (Af(922 × 1,325 (16 KB)) - 20:53, 14 January 2014File:Paleontology fig1.png ...a altispira''. Paleoecological abbreviations: Bathy = bathyal, M = middle, U = upper, O = outer, I = inner. (From Armentrout, 1987.)(1,953 × 1,521 (104 KB)) - 17:48, 14 January 2014