The initial values are $0.00 $3.50 -$2.50 $0.00

New values are -$2.25 -$6.45

$3.50 + -$2.25 = $1.25
-$6.45 incremented by $3.50 is -$2.95
-$2.95 + -$2.25 + $3.50 = -$1.70

-$1.70
-$5.20