5 days ago you thought that the crude oil price was going to drop so you went ahead and sold 10 futures contracts with delivery in 5 days (which is today). The original delivery price you sold at was $52.00 per barrel. Below is how the crude oil fluctuated during the 5 days since you sold the contract:

Day0

$52.00

Day1

$51.76

Day2

$51.56

Day3

$52.33

Day4

$51.99

Day5

$52.33

a. Whats your total P/L?

b. Mark your account balance to market at the end of each day, assuming a 15% initial margin requirement.