How many pounds of candy that sells for $0.71 per lb must be mixed with candy that sells for $1.29 per lb to obtain 7 lb of a mixture that should sell for $0.95 per b.? $0.71-per-lb candy:b (Type an integer or decimal rounded to two decimal places as needed.) $1.29-per-lb candy b (Type an integer or decimal rounded to two decimal places on needed.)