Ricardo has 2020 coins, some of which are pennies (1-cent coins) and the rest

Ricardo has 2020 coins, some of which are pennies (1-cent coins) and the rest

Ricardo has 2020 coins, some of which are pennies (1-cent coins) and the rest of which are nickels (5-cent coins). He has at least one penny and at least one nickel. What is the difference in cents between the greatest possible and least possible amounts of money that Ricardo can have?

(A) 8062 (B) 8068 (C) 8072 (D) 8076 (E) 8082

answer：C