15.某楼盘商品房成交价今年3月份为a元/m3,4月份比3月份减少了8%,若4月份到6月份平均增长率为12%,则6月份商品房成交价是( )
0 282301 282309 282315 282319 282325 282327 282331 282337 282339 282345 282351 282355 282357 282361 282367 282369 282375 282379 282381 282385 282387 282391 282393 282395 282396 282397 282399 282400 282401 282403 282405 282409 282411 282415 282417 282421 282427 282429 282435 282439 282441 282445 282451 282457 282459 282465 282469 282471 282477 282481 282487 282495 366461
| A. | a(1-8%)(1+12%)元 | B. | a(1-8%)(1+12%)2元 | C. | (a-8%)(a+12%)元 | D. | a(1-8%+12%)元 |