HELP A new mixture of self-tanning & moisturizing lotions for everyday use is being developed. This mixture is made by mixing 500 ounces of everyday moisturizing lotion
for $0.50 per ounce with self-tanning lotion worth $2 per ounce. If the new self-tanning & moisturizing lotion mixture is to cost $1.40 per ounce, how many ounces of
the self-tanning lotion should be in the mixture?