A:Welcome to Xingxing Clothes Store,Can I (51) you?
B:I'd like to buy a sweater (52) my mum.Her birthday is coming.
A:A happy mum!What size do you want for your mum?
B:Small is OK.
A:All right.What (53) does your mum like?
B:She likes white.It looks good on her.
A:What about this one?
B:It looks beautiful.How (54) does it cost?
A:Oh,it's 168 yuan.
B:Well,that's great!I'll (55) it.I'm sure she will like it.