The company 'C' conducted sales for two distinct types of cars, namely 'Exter' and 'Creta' over the course of three consecutive months. The ratio of the number of Exter sold by the company in March and April is 4 : 5 respectively. The number of Exter sold by the company in April is 261 more than the number of Creta sold by the company in the same month. The number of Creta sold by the company in April is 90% of the number of Exter sold by the company in May. The ratio of number of Creta sold in March and the number of Exter sold in May is 5 : 3 respectively. The total number of Creta sold in all three given months together is 539 and no Creta were sold in May.