32. Based on the regression output in Exhibit 3 and sales data in Exhibit 4, the forecasted value of quarterly sales for March 2016 for PoweredUP is closest to:

A. $4.193 billion.

B. $4.205 billion.

C. $4.231 billion.

C is correct. The quarterly sales for March 2016 is calculated as follows:

ln Salest – ln Salest–1 = b0 + b1(ln Salest–1 – ln Salest–2) + b2(ln Salest–4 – ln Salest–5).

ln Salest – ln 3.868 = 0.0092 – 0.1279(ln 3.868 – ln 3.780) + 0.7239(ln 3.836 – ln 3.418).

ln Salest – 1.35274 = 0.0092 – 0.1279(1.35274 – 1.32972) + 0.7239(1.34443 – 1.22906).

ln Salest = 1.35274 + 0.0092 – 0.1279(0.02301) + 0.7239(0.11538).

ln Salest = 1.44251.

Salest = e1.44251 = 4.231.

完全忽略t-stat 直接全部带入计算。求解答，难道所谓的"based on output"不用理会显著性？