shan has 43 pennies, 31 nickels, 21 dimes, 10 quarters and no other coins in his piggy bank. He wants to buy a toy car which cost 3 dollars and 99 cents. Find
A) a smallest number of coins which are worth exactly the price of the toy, so there is no change

B) the smallest number of coins which are worth at least the price of a toy, expecting possible change

C)the largest number of coins which are worth exactly the price of the toy with no change