He might have been really angry. After all, having a hairstyle that goes against his gender identity can be quite frustrating. He could have protested loudly and refused to go out in public until the hairstyle was changed.
The rates for novel translation can vary widely. It might range from $0.05 to $0.20 per word on average. Some beginners might charge less, around $0.03 per word, while highly experienced and specialized translators could charge more, up to $0.30 or even higher per word, depending on the complexity of the novel, the languages involved, and the target market.
Nezuko is initially 12 years old in the manga. As the story unfolds, her age doesn't change significantly in a traditional sense, but her character development is quite remarkable.