Final answer:
The customer saved $265.65 by using her insurance to pay for her two prescriptions, which would have otherwise cost her $285.65 at retail price.
Step-by-step explanation:
The customer had two prescriptions that would have cost her $38.85 and $246.80, respectively, without insurance. However, with insurance, she only pays $10 for each prescription. To calculate the total savings, we add the retail prices of both prescriptions and then subtract the amount the customer pays with insurance.
Retail price of two prescriptions: $38.85 + $246.80 = $285.65
Customer pays with insurance: $10 + $10 = $20
Total savings: $285.65 - $20 = $265.65
Therefore, the customer saved $265.65 by using her insurance.