Figure shown relates to the manufacture of roof bolts. With respect to the cost/revenue vs production level, match the appropriate trend line with corresponding description. 
A country's exports are valued at 800 crore, and its imports are valued at 950 crore in a given year. Due to a trade agreement, the country receives a 10% bonus on its export value from a partner nation. What is the effective trade balance of the country after accounting for the bonus?
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?