Output always 0 when involved int and double on c program – Debian

i’m trying to make a calculation for wages and the requirements as below:

• basic pay = 12.00 /hr
• OT (>40hrs)=1.5x pay per hr
• tax
• 15% first 300
• 20% 301<=payout<=450
• 25% >450

I declare the variables as follows:

• hours as hrs
• gross payment as gross
• taxed as tax
• total payout after deduction as pymt

I import my header as this

#include <stdio.h>
#include <stdlib.h>

I define my constant as this

#define bsc 12.00
#define t300 0.15
#define t150 0.20
#define t_rest 0.25
#define OT 40

This is how i defined my function

int main()
{
    int hrs=0;
    double gross = 0.00;
    double tax = 0.00;
    double pymt = 0.00;
    printf("How many hours worked this week?n");
    scanf("%i", &hrs);

    if (hrs <= 40)
        pymt = hrs * bsc;
    else
    {
        pymt = 40 * bsc;
        double OTpymt = (hrs - 40) * (bsc * 1.5);
        pymt += OTpymt;
    }
    
    if (gross <= 300)
    {
        tax = gross * t300;
    }
    
    else if (gross > 300 && gross <= 450)
    {
        tax = 300 * t150;
        tax += (gross - 300) * t150;
    }

    else if (gross > 450)
    {
        tax = 300 * t300;
        tax += 150 * t150;
        tax += (gross - 450) * t_rest;

    }

    pymt = gross - tax;
    printf("ngross: %.2lfn", gross);
    printf("tax: %.2lfn", tax);
    printf("total pay: %.2lf", pymt);


    return 0;
}

When I debug and insert any value in user input, it always opt as 0.00.
and this is the image –>
image

I need help without changing my int variable to other data type? took me days but still unable to find out the solution. i’m currently using c17. I had 4 different operating systems (Win10, Win11, Debian, Mac12) and it gives same outcome.

note: i tried %.2f for the specifier, and it still not working at all. also the same as i declare my constant as double.