JavaScript function is not sending variable

Question

function ispisProizvoda(nizProizvoda){
    // console.log(nizProizvoda)
    let html = "";
    let divIspis = document.querySelector("#ispis-proizvoda");

    if(nizProizvoda.length == 0){
        html = `<div class="row">
                    <div class="col-12">
                        <p class="alert alert-danger">Trenutno nema proizvoda.</p>
                    </div>
                </div>`;
    }
    else{
        for(let objProizvod of nizProizvoda){
            html += `<div class="row my-3 border">
                        <div class="col-4">
                            <img src="${objProizvod.slika}" alt="${objProizvod.naziv}"  />
                        </div>
                        <div class="col-8">
                            <h2>${objProizvod.naziv}</h2>
                            <p>${ispisNaziva(objProizvod.kategorijaID, kategorije)}</p>
                            <p class="alert alert-primary">${ispisNaziva(objProizvod.brendID, brendovi)}</p>
                            <hr />
                            ${ispisDostave(objProizvod.besplatnaDostava)}
                            <div class="popust">
                                
                                <div class="cena">
                                    **${shipping(objProizvod.price)}**
                                </div>
                            </div>
                            <div class="specifikacije pt-4">
                                <p>Specifikacije</p>
                                <ul>
                                    
                                </ul>
                            </div>
                        </div>
                    </div>`
        }
    }

    divIspis.innerHTML = html;
}




function shipping(getPrice){
    let html = "";

    if(dostava){
        html = `<p class="alert alert-success">Besplatna dostava</p>`;
    }
    else{
        html = `<p class="alert alert-danger">Nema besplatne dostave</p>`;
    }
    return html;
}

I have a problem, function call shipping() is not senind any data, if I console log getPrice in function it says it is undefined, I tested varable in function call and has value, so that is not the problem.I used ajax to fetch data and data is stored in local storage, I don't know why this function is not working. Other functions are working. Is it beacuse I called function before it is declared?