In this case, I deeply believe there will badly affect the fast - food industry and consumers.

In the aspect of the fast food industry, the fast food industry will lose its revenue because some money are stolen by the cashiers. The reputation will be ruined because the consumer may think that they are being cheated. The consumer may wonder if the fast food industry is honest and and has competence. The integrity will be lost. The consumer are likely not to patronize the fast food shop. The revenue of the fast food industry will be lower even more.

As for the consumers, they may spend additional money to buy food since they may receive less money while changing.

Please correct it if i make mistakes~thanks
Hi,

In this case, I deeply believe there will be a bad effect on the fast-food industry and consumers.

The fast food industry will lose some revenue because some money will be stolen by the cashiers. Its reputation will be ruined because the consumer may think he or she is being cheated. The consumer may wonder if the fast food industry is honest and competent. Its integrity will be lost. The consumer is not likely to patronize fast-food shops, so their revenue will be even lower.

Consumers may spend additional money to buy food since they may receive less money while changing.

I don't understand the last point in red. Try to rewrite it in another way.

Best wishes, Clive
Consumers may spend additional money to buy food since they may receive less money when the cashiers shortchange the consumers.

I don't know if i am right or not. Thanks for your help~
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Hi again,

Consumers may spend additional money to buy food since they may receive less money when the cashiers shortchange the consumers.

Consumers may have to spend more money to buy fast food since they may be short-changed by the cashiers.

Best wishes, Clive