Meat was on sale for half price at the supermarket, so I bought a week's worth.
Some meat was 50% off at the grocery store, so I bought enough for one week.
ーMeat was on sale for half price at the supermarket, so I bought a week's worth.
「スーパーでお肉が半額だったので、１週間分買った」
on sale で「売りに出されて・特価で」
for half price で「半額で」
a week's worth で「１週間分」
ーSome meat was 50% off at the grocery store, so I bought enough for one week.
「スーパーでお肉がいくつか５０％オフだったので、１週間分買った」
to buy enough for one week で「１週間に必要なだけ買う」＝「１週間分買う」
ご参考まで！
The meat at the supermarket was half price, so I bought a week's supply.
The meat at the supermarket was half price, so I bought a week's supply.
『スーパーのお肉が半額だったので、1週間分の備蓄/供給量を買いました。』
half price：「半額」という意味で、for half price や 50% off とも言えます。
カナダ 
アメリカ合衆国 
