Economics

Could you show me mistakes in the following sentences!
If it's not correct, may you repair it and give me advices!
Thank you so much for your help!^^

With the current competition, rising price is impossible, so I think we will try to improve the productivity in our factory.

The living standard in the developed countries is much higher than the developing countries

I’m afraid that I have to cancel your visit to the Esonne factory at 9.30 on Friday because production manager has been ill since this week.

This month, we are spending 15% discount for every new customer.

She called about a half hour ago but not leaving a message

Many elements influent the success of a business, including the government’s policies

You can find anything you want in our store, because we have much various goods
Banks gain the profits when they lend customer or businesses money..

The quality of goods is too bad for us to accept the delivered goods

The price of our share increases about by 5% every year,

This is the first visit of me to London

Thank you to the letter on 20, may, which offer me to accept the chief accountant in your company.

If the customers pay within 30 days, they will save much money.

I think we should decrease prices for students, because they don’t have much money

We not only export goods and services but also high-degree experts to the developing countries

If you accept this job, you will get high salary.

I’m afraid that we can’t buy this computer because it is too expensive.

Please research this contract carefully before signing.

All types of advertising have a common objective that helps the manufactures sell more goods. Besides, advertising also provides necessary information to consumers.

The bank for investment and development increases lending interest from 7.75% to 8.25% per year.

If the company earns more profits, the dividend of it will be higher.

The main reason for our success is quality.
Our annual turnover is about 10 billion dollars

Their customers usually complain about deferred payment.

Last year, she invested all of her money in a computer company in Ha Noi
Our company specializes in high quality products

Services which the domestic and foreign companies provide to businesses in export processing zone won’t be levied on value- added tax.

Not like shareholders, bondholders are not proprietors of a business. They are creditors of it.

Income tax is the tax that government imposes on income of individuals and business firms. Taxes on private incomes and corporation profits are main revenues of almost the industries countries, they also play more and more important role in tax system of the developing countries.

When individuals or companies buy shares of a company, they will receive stock certificates indicate the number of shares they hold
For exporting and importing goods, it needs a system of international foreign exchange. Currently, almost foreign currencies are exchanged by the floating exchange rate. Sometimes, the big fluctuations of exchange rate may threaten the stability of the economy.

The extent of a country is determined by aggregation of goods and services that it creates.

Fiscal policy that ministry of Finance implements can be broken down by 2 parts: government expenditure and taxation.