Allen would be willing to pay for a newsletter at about $200.
Stock market:
$((1400 x 0.4) + (800 x 0.4) + (0 x 0.2)) = $880
Bank deposit:
$((900 x 0.4) + (900 x 0.4) + (900 x 0.2)) = $900
Maximum Expected monetary value is $900
$((1400 x 0.4) + (900 x 0.4) + (900 x 0.2)) = $1100
Expected value with perfect information is : $1100-900 = $200
EVI- $200 (THE AMOUNT ALLEN WOULD BE WILLING TO PAY)
Attached is the table