2 彩電計稅銷售額:57500/(1+3%)=55825.24
3①3000*300+200/(1+17%)*300=951282.05
②100000*(1+10%)=110000
③10000+3510/(1+17%)=103000
④2000000*(1-5%)=1900000
⑤應稅銷售額就是:5850
⑥4680/(1+17%)*500=2000000
⑦應稅銷售額:80000000