Supplied goods costing RS. 600 to mohan and
issued invoice at 10%
above cost and allowed
5% discount.

Dr Mohan account 627

Cr Sales 627

Explanation:

Preparation of Journal entry

If the amount of RS. 600 is the goods costing that was supplied to mohan in which the issued invoice is 10% above cost with a 5% discounts the First step will be to calculate the Invoice price.

Calculation of the invoice price

Invoice price=[600+10%*600)+[5%*(600+10%*600)]

Invoice price=(600+60)-[5%*(600+60)]

Invoice price=660-(5%*660)

Invoice price=660-33

Invoice price=627

Now let prepare the Journal entry

Dr Mohan account 627

Cr Sales 627

(Being to record good sold to Mohan)

3rd the reason why is because of management and leadership

the answer is true.  i do believe this is the answer because of the amount of wrecks people get into each year.  if you double this with avoiding those so said wrecks, that would make you a "skilled" driver.