For her birthday,Sara decided to buy and Ipad for 4000 EGP. since she does not have enough money, she suggested to pay 1/5 of the price & the rest on monthly installments. The vendor needs an advance

For her birthday,Sara decided to buy and Ipad for 4000 EGP. since she does not have enough money, she suggested to pay 1/5 of the price & the rest on monthly installments. The vendor needs an advance payment not less than 500 EGP. The rest will be paid on 6 monthly installments that are almost equal.

calculate the amount Sara suggests to pay.