3 sentences

1. 你直接打电话给我不是更划算吗？

   nǐ zhí​jiē dǎ diàn​huà gěi wǒ bù shì gèng huá​suàn ma?

   Wouldn't it be cheaper if you gave me a call?

   Source: OpenSubtitles

2. 趁打折的时候买这台电脑非常划算。

   chèn dǎ​zhé de shí​hou mǎi zhè tái diàn​nǎo fēi​cháng huá​suàn.

   Buying this computer while it is on sale is a real bargain.

   Source: Dong Chinese Dictionary

3. 他心里正在划算着这笔账。

   tā xīn​li zhèng​zài huá​suàn zhe zhè bǐ zhàng.

   He is calculating the accounts in his mind.

   Source: Dong Chinese Dictionary