var complex = [
    {osn: 3945, usnd: 2285, usndr: 3115, envd: 2715},
    {osn: 3945, usnd: 2285, usndr: 3115, envd: 2715},
    {osn: 3945, usnd: 2285, usndr: 3115, envd: 2715},
    {osn: 3945, usnd: 2285, usndr: 3115, envd: 2715},
    {osn: 3945, usnd: 2285, usndr: 3115, envd: 2715}
];

var operations = $('#operations').value()

function price() {
    var index = Math.floor(operations/5)
    return complex[index]
}