I am having troubles figuring out the gain amounts for the following dates below for the given problem:

Problem 14-38 (LO. 1, 2, 3) Karen Samuels (Social Security number 123-45-6789) makes the following purchases and sales of stock. 11-1-2018 Transaction Purchase Purchase Purchase Sale Purchase Sale Sale Sale Date 1 1-2018 6-1-2018 12 -3-2018 3-1-2019 8-1-2019 1-1-2020 2-1-2020 Number of Shares 300 150 60 200 120 90 150 75 Company MDG GRU MDG MDG GRU GRU MDG GRU Price per Share $75 300 70 80 375 330 90 500 Assuming that Karen is unable to identify the specific lots that are sold with the original purchase, what is the recognized gain or loss on each type of stock as of the following dates. If an amount is zero, enter "O".