macro for 5000 rows for subtraction two columns between two sheets

[Hasson]

Hi
I want matching column B for sheet1 with column B:D for sheet2 and should subtract the column E,F for sheet2 from the columns C,D for sheet1 for about 5000 rows and if there is new item in sheet1 then should add to sheet2 as in last row
the result should be in column G,H

DIFFERENT VALUES.xlsm
	A	B	C	D
1	ITEM	ID	INPUT	OUTPUT
2	1	TT/W-1 MM CLA1 23M-1 IT	500
3	2	QQW-2 TH NM-1 CLA2 VBG L CHI		10
4	3	QQW-3 CV CLA3 TAI	700
5	4	QQW-4 M*12.5 CLA4 TR	200	12
6	5	QQW-5 CLA5 EG	300
7		MMR12/100 AS-1000/1 TMR	12
8	6	QQW-6 M230 TU
9	7	QQW-7 S** CLA7 US	1400	1
10	8	QQW-8 CLA8 UK	1500	1
11	9	QQW-9 CLA9 N BR	1600	1
12	10	QQW-10 BN CLA10 IT	800
13	11	QQW-11 LVD CH	900
14	12	BB12 QQW-12 CLA12 JA	1000	11
15	13	QQW-13 CLA13 TR	1100	11
16	14	QQW-14 L/R CLA14 SS230 EG	1200
17	15	QQW-15 CLA15 TU	1300
18	16	QQW-16 CLA16 US	1700	1
19	17	QQW-17 CLA17 UK	1800
20	18	QQW-18 RRSDF BR	1900
21	19	QQW-19 CLA19 IT	2000
22	20	QQW-20 KV/1**2 CLA20 CHI	2100
sheet1

DIFFERENT VALUES.xlsm
	A	B	C	D	E	F	G	H
1	ITEM	ID	DESCIBE	PRODUCTION BY	INPUT	OUTPUT	INPUT	OUTPUT
2	1	QQW-4 M*12.5	CLA4	TR	200	12	0	0
3	2	QQW-5	CLA5	EG	50		-250	0
4	3	QQW-6	M230	TU			0	0
5	4	TT/W-1 MM	CLA1 23M-1	IT	200		-300	0
6	5	QQW-2 TH NM-1	CLA2 VBG L	CHI		10	0	0
7	6	QQW-3 CV	CLA3	TAI	10		-690	0
8	7	QQW-13	CLA13	TR	800		-300	11
9	8	QQW-14 L/R	CLA14 SS230	EG	900		-300	0
10	9	QQW-15	CLA15	TU	1000	11	-300	-11
11	10	QQW-7 S**	CLA7	US	800	11	-600	-10
12	11	QQW-8	CLA8	UK	850		-650	-1
13	12	QQW-9	CLA9 N	BR	1000		-600	-1
14	13	QQW-10 BN	CLA10	IT	250	1	-550	1
15	14	QQW-11	LVD	CH	200	1	-700	1
16	15	BB12 QQW-12	CLA12	JA	1100	1	-100	-10
17	19	QQW-16	CLA16	US	1700	1	0	0
18	20	QQW-17	CLA17	UK	1800		0	0
19	21	QQW-18	RRSDF	BR	1900		0	0
20	22	QQW-19	CLA19	IT	2000		0	0
21	23	QQW-20 KV/1**2	CLA20	CHI	2100		0	0
22	23	MMR12/100	AS-1000/1	TMR			0	-12
sheet2