What is the opportunity cost in this scenario?

a.)[gretchen earned $500 from her summer job].| b.)[ she made a list of things that she wants to do with the money she earned.] she thought of spending $100 to buy a guitar amplifier, enrolling in a ballet class for $200, buying new clothes worth $100, and giving her mom a silver necklace worth $100. |c.)[when she went to buy the amplifier, she found it cost around $150.] she knew that she couldn’t change the fee for the dance classes. so she had to adjust the budget for her clothes or her mom’s gift.| d.)[in the end, she decided she would buy one pair of jeans instead of the two pairs of jeans she had planned.]

You are an employee of an u.s. firm that produces personal computers in thailand and then exports them to the united states and other countries for sale. the personal computers were originally produced in thailand to take advantage of relatively low labor costs and a skilled workforce. other possible locations considered at that time were malaysia and hong kong. the u.s. government decides to impose punitive 100% ad valorem tariffs on imports of computers from thailand to punish the country for administrative trade barriers that restrict u.s. exports to thailand. how do you think your firm should respond? what does this tell you about the use of targeted trade barriers?

Atrough in the business cycle occurs when

When it is 4: 00 a.m. in halifax, it is 1: 00 p.m. in karachi, and when it is 9: 00 a.m. in karachi, it is 5: 00 a.m. in warsaw. mary left halifax to fly to karachi, but she accidentally left her watch on warsaw time. according to mary’s watch, she left halifax at 9: 40 p.m. on monday. the local time when she arrived at karachi was 3: 00 p.m. tuesday. how long was mary’s flight? a. 9 hours, 20 minutes b. 13 hours, 20 minutes c. 14 hours, 20 minutes d. 17 hours, 20 minutes