A.81元B.2319元C.2400元D.2481元
A.10000╳6-8000╳(8%+2%+0.5%+12%)╳6=49200元B.10000╳6-10000╳(8%+2%+0.5%+12%)╳6=46500元C.10000╳6-5000╳6-8000╳(8%+2%+0.5%+12%)╳6=19200元D.10000╳6-5000╳6-10000╳(8%+2%+0.5%+12%)╳6=16500元