no of supplier spend with spend bucket range

create table rangespendbucket(rangespend varchar2(40), id number)
insert into rangespendbucket values('100-200',1);
insert into rangespendbucket values('200-500',2);
insert into rangespendbucket values('500-1000',3);
insert into rangespendbucket values('1000-',4);
commit;

create table spend(supplier varchar2(40), cy_spend number) insert into spend values('A',100);
insert into spend values('B',25);
insert into spend values('C',30);
insert into spend values('D',1000);
insert into spend values('E',10);
insert into spend values('A',200);
insert into spend values('F',0);
insert into spend values('E',20);
insert into spend values('C',540);
insert into spend values('B',300);
insert into spend values('A',300);
insert into spend values('C',10);