function solve(stock = [], ordered = []){

  function addingToArr(inStock = []){

      let inStockOutput = [];

      for(let i = 0; i < inStock.length; i++){

          if(i % 2 == 0){
              let name = inStock[i];
              let count = Number(inStock[i + 1]);

              let product = { name, count };
              inStockOutput.push(product);
          }
      }
      return inStockOutput;
  }

  let firstArray = addingToArr(stock);
  let secondArray = addingToArr(ordered);
  let merged = firstArray.concat(secondArray)

  let result = []
  for (const element of merged) {
    let missingInTheResultArray = true
    for (const resultElement of result) {
      if(element.name === resultElement.name){
        resultElement.count += element.count
        missingInTheResultArray = false
      }
    }
    if(missingInTheResultArray) {
      result.push(element)
    }
  }

  console.log(result)

}

solve(['Chips', '5', 'CocaCola', '9', 'Bananas', '14', 'Pasta', '4', 'Beer', '2'],
  [
  'Flour', '44', 'Oil', '12', 'Pasta', '7', 'Tomatoes', '70', 'Bananas', '30'])