Get cost sms campaign

@param callback
@param sender
@param body
@param addressbook_id
@param phones
function smsGetCampaignCost(callback, sender_name, body, addressbook_id, phones){
    if (sender_name === undefined) {
        return callback(returnError("Empty sender name"));
    }
    if (body === undefined) {
        return callback(returnError("Empty sms text"));
    }
    if ((addressbook_id === undefined) || (phones === undefined) || (!phones.length)) {
        return callback(returnError("Empty book id or phones"));
    }
    var data = {
        'sender': sender_name,
        'body': body,
        'addressBookId': addressbook_id
    }
    if (phones.length) {
        data['phones'] = JSON.stringify(phones);
    }

    sendRequest('sms/campaigns/cost', 'GET', data, true, callback);
}