JSFiddle - React, Tailwind, and code Playground

HTML

<div class="price">
    <div class="price-item">
        <div class="price-label">Наименование</div>
        <div class="price-price">126 руб.</div>
        <div class="price-dots">&nbsp;</div>
    </div>

    <div class="price-item">
        <div class="price-label">Еще наименование</div>
        <div class="price-price">1234 руб.</div>
        <div class="price-dots">&nbsp;</div>
    </div>
</div>

CSS

.price {
    margin: 10px 0;
}

.price-item,
.price-dots {
    overflow: hidden;
}

.price-label {
    float: left;
}

.price-price {
    float: right;
    font-weight: bold;
}

.price-dots {
    border-bottom: #aaa 1px dotted;
}