Trying to use the latest price data using Chainlink in Remix it throws me an error

Question

Hello iam trying to get the latest price data using Chainlink Data Feeds but it throws this error :

pragma solidity 0.7.6;
// SPDX-License-Identifier: MIT

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "contracts/Token.sol";


contract DonateContract {
AggregatorV3Interface internal priceFeed;
address payable owner; // contract creator's address


constructor() {

priceFeed = 
AggregatorV3Interface(0x2514895c72f50D8bd4B4F9b1110F0D6bD2c97526);
owner = payable(msg.sender); // setting the contract creator

}

function donate(uint256 _payAmount) public payable  {

(bool success,) = owner.call{value: _payAmount}("");
 require(success, "Failed to send money");
 CRON token = CRON(0x2F718Bc4390F8662bB664D1FDd88494ac6bE71eC);
 uint256 cost =  _payAmount * 6 * priceFeed.latestRoundData ;
 token.transfer(owner,cost);
}  

}

Answer 1

Two things:

1. priceFeed.latestRoundData() returns 5 data points:

uint80 roundID,  
int price,  
uint startedAt,
uint timeStamp,
uint80 answeredInRound

I'm assuming you want just the price which you can isolate with a line like this in your code:
(,int price,,,) = priceFeed.latestRoundData();

2. price is of type int while your cost and _payAmount variables are of type uint. I recommend changing them to type int to match the feeds type. If you really need to you can typecast the price variable to uint or your cost and _payAmount variables to int with a line like this:
   int cost = int(_payAmount) * 6 * price;