Sales of boxes of KN-95 masks have grown steadily at online stores in the KSA during past 12 periods (see table below). The predicted sales (round up to two decimal places) for the 13th and 14th period would be: Period 1 2 2:3 3 4 5 6 7 8 9 10 11 12 Boxes (in thousands) 250 268 289 314 337 367 391 409 433 459 481 500 Show your calculation steps. FITB/MCQs a. 523398.60 b. 529398.60 c. 523938.60 d. None of the answers