extern crate fstrings; fn main() { let FICA_RATE:f64 = 0.0765f64; let PAY_RATE:f64 = 20.f64; let mut annual_salary:f64 = 0.0; annual_salary = PAY_RATE * 2080.0f64; let mut FICA_tax:f64 = annual_salary * FICA_RATE; let mut s1:&str = f!("FICA Tax Rate: {FICA_RATE}"); println!("{}", s1); println!("{}", f!("Annual Salary: {annual_salary}")); println_f!("FICA Tax: {FICA_tax}"); }