OP stated the wife was forced to buy (at inflated prices) from the hotel shop as all other shops were closed (though if clothes were bought for each of the 7 days, it may be a bit much and Hari Raya is only 1 day, even if this was in Terengganu). Hence, such receipts should be kept to explain any significantly higher payment.

The airline may offer a flat rate much lower than required in such cases, but again, it is strongly recommended to retain receipts (see MAVCOM’s page an other similar articles on the matter), particularly in case the claimant is unhappy with the compensation offer.