How to sum values in typescript array based on array items property?

I'm working on small angular project. I have an array of receipt items, e.g. coke, fanta, pepsi, juice etc, with their prices and quantity of course.

receiptItems: Array<ReceiptItem>;

This is how ReceiptItem looks :

export class ReceiptItem {

  public id: string;
  public product: Product;
  public unitOfMeasure: UnitOfMeasure;
  public discount: number;
  public price: number;
  public quantity: number;
  public total: number;
  public tax:Tax;

 }

How can I in typescript get sum of total amount but only where property tax for example is equal to "25%"?

In C# I remember I've used lambda expressions like this:

IEnumerable<ReceiptItems> results = receiptItems.Where(s => s.Tax == "25.00");
   totalSum = results.Sum(x => (x.TotalAmount));

How to achieve something similar in TypeScript / Angular?

Arrays in JavaScript/TypeScript also have these kind of methods. You can again filter with you condition and then use reduce aggregation function to sum the items.

const sum = receiptItems.filter(item => item.tax === '25.00')
                        .reduce((sum, current) => sum + current.total, 0);

item.tax === '25.00' - this part you must adjust with your logic