In the quarter ended 31 March 20X2，Chas had taxablesales，net of sales tax，of $90,000 and taxable purchases，net of sales tax，of $72,000.
If the rate of sales tax is 10%，how much sales tax is due？（）

An organisation's inventory at I July is 15 units at $3.00 each.The following movements occur：
3 July 20X4        5 units sold at $3.30 each
8 July 20X4        10 units bought at $3.50 each
12 July 20X4      8 units sold at $4.00 each
Closing inventory at 31 July，using the FIFO method of inventory valuation，would be（）

Write a letter on a suggestion regarding opening a new theme park in the city to the board of directors，based on the following reasons：
（1）Doing market research since August（online questionnaires and more than 200respondents）；
（2）The city has a good location with a large population；
（3）Our competitors plan to expand their business；
（4）Needing to find out enough funds available.