Please reckon up how much I must pay.

请你算一算我该付多少钱?

《新英汉大辞典》

Reckon up all your money and see if you have enough.

估算一下你一共有多少钱，看是否已经足够了。

《新英汉大辞典》

We had to reckon up the gains as well as the losses.

他们好不容易才做到得失相当。

youdao

"I reckon if you give me until tomorrow," Ransie pleaded, "I might be able to scrape it up somewhere.

VOA: special.2009.11.14

"I reckon you'll be goin' back up to the cabin, along with the cart," said Ariela.

VOA: special.2009.11.14

That ain't much, but I reckon that'll get me up to brother Ed's."

VOA: special.2009.11.14

Privately her political opponents reckon she comes up with half decent questions.

BBC: FMQs is back. Oh yes it is.

Analysts at UBS, a bank, reckon that euro break-up could cost a peripheral country 40-50% of GDP in the first year, and a core country 20-25% (see article).

ECONOMIST: Europe's currency crisis

Opponents reckon they have colluded in making up optimistic projections about the speed with which airlines will change to yet-to-be-built clean, quiet aircraft.

ECONOMIST: Business travel