free -b Error

[witt-bit]

I'm submitting a ... (check one with "x")

[x] bug report
[ ] new distro request

Bug report

=> search Github for a similar issue or PR before submitting
=> download the latest revision from Github and check if the bug is still present
   -> https://github.com/KittyKatt/screenFetch/raw/master/screenfetch-dev
=> Show us the output of: screenfetch -v

New distro request

Distro name:
Homepage:
Distro logo:
Package manager:

Show us the output of
 => lsb_release -sirc
 => cat /etc/os-release
 => ls -1 /etc/*-release

Error near line 1892

mem=$(free -b | "${AWK}" -F ':' 'NR==2{print $2}' | "${AWK}" '{print $1"-"$6}')
usedmem=$((mem / 1024 / 1024))
totalmem=$((${mem//-*} / 1024 / 1024))

Command free -b error

free: Multiple unit options don't make sense.

My OS is manjaro

$ bash screenfetch-dev

screenfetch-dev: 行 1892: -: 语法错误：需要操作数（错误记号是 "-"）

 ██████████████████  ████████     witt@witt-cool
 ██████████████████  ████████     OS: Manjaro 24.2.1 Yonada
 ██████████████████  ████████     Kernel: x86_64 Linux 6.12.4-1-MANJARO
 ██████████████████  ████████     Uptime: 3d 9h 14m
 ████████            ████████     Packages: 1378
 ████████  ████████  ████████     Shell: zsh 5.9
 ████████  ████████  ████████     Resolution: 3840x1080
 ████████  ████████  ████████     DE: KDE
 ████████  ████████  ████████     WM: KWin
 ████████  ████████  ████████     GTK Theme: WhiteSur-Dark-solid-alt-blue [GTK2/3]
 ████████  ████████  ████████     Icon Theme: Tela-circle-manjaro-light
 ████████  ████████  ████████     Disk: 215G / 459G (50%)
 ████████  ████████  ████████     CPU: AMD Ryzen 5 4500U with Radeon Graphics @ 6x 2.375GHz
 ████████  ████████  ████████     GPU: AMD Radeon Graphics (radeonsi, renoir, LLVM 18.1.8, DRM 3.59, 6.12.4-1-MANJARO)
                                  RAM: -