First, determine the total David paid: ($1.28/lb)(3.5 lb) + ($0.55/lb)(2.4 lb) =
$4.48 + $1.32 = $5.80
Next, determine the total # of pounds of fruit David bought: 3.5+2.4 lb = 5.9 lb.
Then the average David paid per pound for his fruit was
$5.80
----------- = $0.98
5.9 lb
David paid an average of $0.93 per pound of purchased fruit.