How would I make it so the 4 input are stored in memory and calculate the result using the "sub" instruction?

.intel_syntax noprefix .data Income Prompt: .ascii "What is your mothly income? \0" Income: .quad O Rent Prompt: .ascii "How much is your monthy rent? \0" Rent: .quad O Credit Cardprompt: .ascii "How much do you swipe each month? \0" CreditCard: quad o CarPrompt: ascii "How much is your monthly car payment? \0", Car: .quad O Outgo: .ascii "Your total outgo is $\0" NetIncome: .ascii "You're actual net income is $10" .text .global _start start: lea rdx, Income Prompt call PrintCString mova rdx, Income call ScanInt lea rdx, Rent Prompt call PrintCString mova rdx, Rent call ScanInt lea rdx, CreditCardprompt Call PrintCString movq rdx, CreditCard call ScanInt lea rdx, CarPrompt Call PrintCString movq rdx, Car Call ScanInt lea rdx, Outgo Call PrintCString lea rdx, Net Income Call PrintCString .intel_syntax noprefix .data Income Prompt: .ascii "What is your mothly income? \0" Income: .quad O Rent Prompt: .ascii "How much is your monthy rent? \0" Rent: .quad O Credit Cardprompt: .ascii "How much do you swipe each month? \0" CreditCard: quad o CarPrompt: ascii "How much is your monthly car payment? \0", Car: .quad O Outgo: .ascii "Your total outgo is $\0" NetIncome: .ascii "You're actual net income is $10" .text .global _start start: lea rdx, Income Prompt call PrintCString mova rdx, Income call ScanInt lea rdx, Rent Prompt call PrintCString mova rdx, Rent call ScanInt lea rdx, CreditCardprompt Call PrintCString movq rdx, CreditCard call ScanInt lea rdx, CarPrompt Call PrintCString movq rdx, Car Call ScanInt lea rdx, Outgo Call PrintCString lea rdx, Net Income Call PrintCString