If f(x) = 3x + 1 and g(x) = 2x - 3, what is the product of f(-8) and g(6)? A: 437
B: -207
C: -361
D: 171

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is